Best Narrow Booster Seats in 2022 – Reviews & Buyer’s Guide

In this guide, we want to talk with you about the narrow booster seats for babies. You will find the different types of these narrow booster seats and these seats introduced by the different companies. But here the main question is which company seat is best and comfortable for your baby?

Which seat are you going to buy?  All the answers are given below but first, we will tell you about the narrow booster seats.

These narrow booster seats represent one of the greatest safety mechanisms for children in cars, being able to avoid minor damages and injuries in a moderate accident. So it is an essential element in the routine of any family with young children.

In the following articles, you can find the best options in the market, what you should look for and what are the best narrow booster seats. Here we will tell you what you need so you can make a better purchase decision.

Let’s Explore the most important points first:

  • A baby car seat is indispensable and must be on all the lists of future parents. Today, all narrowest booster baby seats must meet certain safety standards, so you can feel calm that your child will be safe and secure in the car.
  • Remember that you will use the baby chair quite frequently, so finding one that is easy to install and secure is important. Some chairs have indicators to confirm that it is correctly installed and leveled.
  • Not all narrowest booster seats are appropriate for all babies. It is important to consider your age and size to determine which is the right chair and which best fits your baby. Later we will talk about the different types of chairs and which one is best for your little one.

Diono Radian 3R, 3-in-1 Convertible Car Seat

  • Extended rear-facing.
  • Backless booster seat.
  • Twelve-position headrest.

Peg Primo Viaggio

  • Side Impact Protection.
  • Easy Adjustability.
  • Comfort Recline.

Diono Radian 3RXT, 4-in-1 Convertible Car Seat

  • Award winning Radian ALL-IN-ONE convertible car seat
  • Steel reinforced frame
  • One hand easy adjust 12 position headrest.

1. Diono Radian 3RXT Review:


  • This narrow backless booster seat comes in the thirteen different color choices.
  • The steel frame is provided by this seat.
  • It comes with the Super LATCH connectors.
  • The fabric of this seat is soft and plush.
  • It also provides you an infant cushion.

Diono narrowest booster seat is top-notch they are very safe and will see your child from child to large child (really big!). The company’s Radian narrowest booster seat on the market is designed to fit three in most medium-sized rear seats, a great advantage for families of more than 3 children or families who just want more back seat space.

The 3RXT narrowest booster seat is the top model in the Radian line. The Radian 3R and Radian 3RX are less expensive, but unlike those models, the 3RXT has an additional 12-head reinforced headrest.

As for safety, the Radian 3RXT narrow booster seat is designed primarily to protect your child. The steel alloy frame has aluminum reinforced sidewalls, the solid metal construction really makes this car seat stand out from the competition.

In addition to this, the seat is lined with EPS foam and has a patented Safe Stop harness to absorb impacts in the event of a crash, and the headrest provides additional protection.

As an important safety measure, your child can travel in the safest rear-facing position in this seat of up to 20 kg, a heavier weight rating than the Radian 3R slimmest booster seat model. Once your child passes the rear-facing seat, turn it to a front seat facing the car with a 5-point harness and then turn it into a booster seat with a high-backed belt and seatback.

In theory, your child can travel in the elevator up to 54 kg; that is more than most children will need, but a reassuring safety rating. For newborns and smaller babies, the narrowest booster seat on the market comes with head and body support cushions, so you can skip the baby safety seat and use it if you wish. The expiration date on this seat is 10 years, approximately 2 to 4 years longer than most seats, so you can really see it during your child’s first decade.

The Radian 3RXT narrow high back booster comes in high-quality fabrics with covers that you can remove and wash by hand (you will have to re-thread the harness to turn on and remove the case). It also has the distinction of being foldable. Yes, you read it right. The seat folds up for storage or travel (the company sells a travel strap that can be very useful). In addition to that, it has the FAA qualification for use on an airplane.

  • This comes in the thirteen different color choices
  • The steel frame is provided by this seat
  • It comes with the twelve-position adjustable headrest
  • Best for the extended rear-facing
  • The fabric of this seat is soft and plush
  • It also provides you an infant cushion.
  • It comes with the Super LATCH connectors
  • The expiration date of this narrow car seat is 10 years


2. Peg Primo Viaggio Review


  • Side Impact Protection
  • Easy Adjustability
  • Comfort Recline
  • LATCH Connectors
  • LATCH system for the installation
  • For the newborns, removable cushions are also provided
  • It comes with the side impact protection feature
  • It provides you the Energy absorbing foam.
  • This seat is used both rear-facing and forward-facing.
  • The weight limit is 5 to 45 pounds for the rear-facing and 22 to 65 pounds for the forward-facing.
  • The five-point safety harness is also provided with this seat.

Now the Primo Viaggio narrowest booster seat is also available in the convertible mode, so you can call it a lightweight convertible car seat. This best narrowest booster seat on the market is used for both newborns and toddlers.

This narrowest booster seat provides the maximum safety to your child. So if you are searching for the lightest infant car seat then this is the perfect item for you.

The Viaggio narrow booster seats are made up of the best quality materials that are why this seat is perfect for the safety of the child. The other reason to buy this slimmest booster seat is that it comes with the different safety features including energy absorption foam, adjustable side impact protection, and a cushion foam element. It comes with fresh jersey fabric and stylish look.

If we talk about the feature of this narrowest booster seat on the market then it allows the child to sit facing back up to 20 kg. The other feature is a 5-point harness and if we talk about the weight limit of this narrow high back booster seat then 45 pounds when the children are in their rear configuration and for facing forward is 65 pounds.

The safety feature side-impact protects your child’s neck, spine, and head. The energy-absorbing foam feature of this narrow backless booster seat also provides protection to your child.

  • It comes with the harness holders
  • The design of this seat is the best and stylish
  • It comes at the high price


3. Diono Radian 3R Review


  • This seat comes with the steel frame
  • Easy installation with the Super LATCH system
  • It provides you the side-impact protection
  • It comes with the five shoulder and 3 buckle positions

The safety of your child does not have to be limited to your vehicle. The DIONO 3R narrowest booster seats allow you to carry it with you to install it in a Taxi (easy to install with Latch or with seat belts), or an airplane (which accepts FAA chairs).

It folds so that it can be transported in a large backpack or with straps (sold separately).

It’s a steel construction, advanced engineering and non-automated manufacturing (even quality of human work!) Make this narrowest booster seat on the market very durable (Heavy-duty) and “overprotective” chair that shields your crazy little ones from being severely affected in a traffic accident.

The compact shape of this narrow booster seats allows the installation of 3 chairs in line in the back seat of your car, ensuring the life and comfort of your children in transit. It is wide enough to prevent dysplasia in babies and can accommodate the support/harness of hip dysplasia.

This slimmest booster seat can be used from newborns with a weight equal to or greater than 5 lbs, and up to 100 lbs.

This narrow high back booster seat is convertible 3-in-1, allowing back position up to 40 LBS (approx. 4 years), forward to 65 lbs and Booster type up to 100 lbs. It has a special base to ensure the correct inclination of the chair in the back position.

The padding is made of memory foam for your children’s comfort, the fabrics are absorbent and the liner can be washed in a washing machine. The lower part has non-slip for easy installation.

Does the 3R have head support/head wings like the 3rxt?

The Radian 3 RXT, Rainier 2AXT are the only convertibles with the head support. The 3R does not have adjustable head support.

How wide is this seat at its widest point?

The widest point is near the top of the shell and it is 17″. Hope this is helpful.

  • Very easy to install it
  • It comes in different colors
  • This seat makes traveling very easy with the babies
  • The price is high


4. Graco SlimFit 3 in 1 Car Seat Review


  • 3-in-1 narrowest booster seats
  • Simply Safe Harness System
  • Adjustable height positions that change as the child grows
  • Integrated storage compartment for harness, when using a seat belt
  • 5-point safety harness $ 10 percent narrower providing more space in the car
  • Slim design with dual integrated cup holders.
  • Graco ProtectPlus Engineered.
  • Safe adjust harness system.
  • 4-position recline.
  • Push-button InRight LATCH.
  • Harness storage compartment.
  • EPS, foam that absorbs energy in case of impact.

The Graco SlimFit 3-in-1 narrowest booster seat saves space in your back seat while giving your child plenty of room to growing up! The exclusive rotating cup holders simply turn outward, which makes the seat be 10 percent thinner for saving space in the back seat.

Is arear-facing car seat5-40 lb (2 – 18kg) and forward 22-65 lb(10 – 30kg), as well as a reinforcement of belt-positioning 30-100 lb (14 -45kg) The Simply Safe Adjust harness system of this narrowest booster seat on the market allows you to easily adjust the harness and the headrest together, to accommodate your child ingrowth with ease.

With the positions of 4reclines, you can keep your child comfortable, while the InRight LATCH system facilitates the installation with a second accessory.

This narrow booster seat is tested against side impacts and Safe Car Seat Engineered, what it gives you tranquility. With all these great benefits, in an elegant space-saving design, the SlimFit is the perfect car seat! From back to front and it becomes a belt-positioning reinforcement.

”Can someone give me the measurements on this?”

Car Seat Width Outside- 19.88 in Car Seat Height- 25.5 in Car Seat Width Inside- 19.75 inches.

”Can I detach the base to fit inside a travel bag?”

There must be a way since it is convertible but I haven’t really looked into it. It does fit in my travel bag with the base on.

  • It comes with the washable padding
  • The cushion of this seat is very simple and comfortable
  • This is the slimmest booster seat and best for the small cars
  • Lightweight narrowest booster seat in the three-in-1 position
  • For the first time, it’s difficult to tighten it


5. Graco Extend2Fit 3-in-1 Car Seat Review


  • Convertible car seat grows with your child from rear-facing harness (4 – 50 pounds) to forward-facing harness (22 – 65 pounds)
  • Made of steel reinforced
  • Slim design with dual integrated cup holders.
  • Graco ProtectPlus Engineered.
  • Safe adjust harness system.
  • Push-button InRight LATCH.
  • Harness storage compartment.
  • Extend2Fit 4-position adjustable extension panel provides up to 5″ additional legroom, allowing your child to safely ride rear facing longer

This narrow booster seat provides you the TRU side protection. This gives you the facility of deep-sided walls and also a specialized foam for the absorbance of energy which greatly helps and protects your baby from neck, spine and head injuries in case of any hectic situation of a crash.

This removable insertion gives an exact positioning comfort for all the smaller children.

Graco Extend2Fit narrow booster seat was designed and frame with great ideas. These seats have a width of 19.5 inches. These Graco Extend2Fit seats are as adjustable as fit into any little or tighter spaces of smaller cars. So it is very easy to install the seats that permitted for “Three across Installation”.

It is certified and approved by FAA so, now you can travel with your toddlers without ant complications and worries anywhere along with these convertible and adjustable car seats.

The Graco Extend2Fit narrow booster seat has a buckle along with an indicator that will facilitate you a visual cue when the user is securely locked. These Graco Extend2Fit Compact Convertible seats are also used in the airplane and also easy to install because of their small size.

  • The installation process is very easy
  • Comfortable and safe for your baby
  • Not reliable in use of bleach

”Will this fit a 4 year old who weighs 33 pounds?”

Yes, this seat will accommodate up to 50 pounds rear facing, allowing your child to safely ride rear-facing longer.


6.Chicco KeyFit 30 Infant Car Seat and Base


  • It comes with the five-point harness
  • The EPS foam is also available
  • Very easy to attach and adjust the LATCH system
  • It provides you the machine washable cover

Many times small is better than bigger. If you have a small vehicle and need a small lightweight car seat then KeyFit 30 narrowest booster seat is perfect. It comes with the best design including cushions and small canopy. It provides you the different excellent features.

KeyFit 30 narrowest booster seat on the market is passed from the crash test and provides you the side impact protection for the safety of your child.

If we talk about the features of this narrow booster seatthen it provides you the harness and canopy. The harness allows the seat to fit your child and canopy provides good protection to your child from the sunlight and air. It comes with a one year warranty.

If you are searching for the slimmest booster seat and also a safe seat for your child then this is the perfect car seat. This seat can’t take too much space in your vehicle.

If you need more than one child seat in your vehicle then Keyfit 30 is the perfect narrow booster seat. If we talk about the measurement of this seat then the dimension is 17×27.5×24 inches and weight is ‎16.6 pounds.

  • Very easy to clean
  • It comes with the best quality
  • Best design for the small babies
  • The installation process is very easy
  • Sun protection is very low

”Does this car seat come with a base?”

Yes, It came with 1 base.

”Do you need to use the base with the car seat?”

Not necessarily. If you want to use latch or the chicco belt locks, you need the base.


7. MESA Infant Car Seat Review


  • Light and resistant, 4.8 kg.
  • Soft fabric and breathable fabric, so that the baby is always dry.
  • Supports adjustable heads and adaptation for premature babies.
  • Side impact protection.
  • Automatic strap adjustment at shoulder height, no need to disassemble buckles.
  • Easy to release from the base and the car with a single button.
  • Adjustable crotch buckle at 2 heights for growth or if the baby wears a lot of clothes.
  • Easy to remove the cover for washing.
  • Fits car cross or sight.
  • Certified 5 stars by NHTSA (US road safety administration).

This narrowest booster seat is recommended to use this chair with babies between a kilo and a half and 15 kg. You will have no doubt that the base is installed correctly since it has an indicator that changes from red to green when its position is appropriate.

The design of this narrowest booster seat on the market allows your baby’s head not to move in case of a side impact.

This narrow booster seat is one of the easiest to install and use. This is due to three main reasons. First, it uses a large LATCH automatic tightening system with a comfortable indicator that indicates when the base is completely fixed to the seat.

Second, also useful during installation, this slimmest booster seat has a 4-position foot that helps you level the base correctly in the car (there is also a leveling indicator on the side).

Third, the headrest and shoulder straps easily adjust between five height positions without the need to rethread (the crotch buckle adjusts between two positions, but with the possibility of rethreading from below).

  • The best seat for the urban people
  • It comes with the adjustable foot
  • It provides you the push-on connectors
  • Without the base, you can easily install this seat
  • The seat is very heavy
  • The price of this seat is high

Is it compatible with bugaboo stroller?

The MESA Infant Car Seat is compatible with the Bugaboo Cameleon, Bugaboo Fox, Bugaboo Bee and Bugaboo Ant strollers when using the Maxi-Cosi car seat adapters for each model (sold separately).

”Do I need to buy a separate base?”

No, it comes with 1 base.


8.Peg Perego Primo Viaggio 4-35 Nido Review


  • This seat is made in Italy
  • The weight range is 4 to 35 pounds
  • It provides you the lightweight carrier
  • It comes with the six-harness position
  • The age of this seat is 7 years
  • Harness storage compartment.

The Primo Viaggio 4-35 narrowest booster seat is the improved, advanced features car seat and this narrow booster seats is specially designed for the safety of babies. This narrowest booster seat on the market will design for the 4 to 35 pounds babies and up to 32″ tall babies.

This narrow booster seat comes with the adjustable side-impact protection and these features provides maximum safety to your child head and shoulder in an accident.

In addition to a comfortable handle, padded for small or premature babies, even a soft, soft, plush, breathable fabric, a 5-point adjustable height harness, canopy, etc.

This slimmest booster seat comes with the double stage cushion and this thing includes 2 types of cushions. The first stage cushion for the newborn babies and the weight limit is up to 4 pounds. This cushion is made up of soft foam and it helps your baby to keep head in the right position.

This narrow high back booster seat comes with the five-harness points and also provides you the big adjustable hood. You can easily use this narrowest booster seat without the base and best seat for the traveling

  • No-rethread harness
  • 14 colors of this seat are available
  • you can easily install this seat without the base
  • For the extra protection, it provides you the anti-rebound bar on the base
  • The cushion of this seat is not machine washable

”Does this include the base?”

Yes, everything in the picture (base and seat) is included.


9. Britax Grow with You ClickTight Plus Harness Review


  • Machine washable cover
  • It provides you the three recline positions
  • Side-impact protection
  • The expiration date of this seat is nine years
  • It comes with the easy click installation

The Britax Pinnacle is the multitasking narrowest booster seats. This narrow booster seat is the combo forward-facing seat. This seat is perfect for the safety of your child as compared to other narrow booster seats.

If we talk about the measurement of this seat then the weight is 26.5 pounds, the dimension is 22.5″x36″x21″ and this dimension is for both booster and harness mode.

If we talk about the design and color of this seat then it comes with the advanced and it is available in three colors in the market including Kate, Venti and Mosaic. You can select the color according to your choice. It comes with the 2 built-in cupholders and the seat cover is machine washable.

If we talk about the important features of this narrowest booster seat then it provides you the three recline position, 9 position harness and also provide you the 3 layer side impact protection for the safety of your child head and shoulder. This narrow booster seats comes with the steel frame. If you are searching for the best narrowest booster seat it will be the best choice for you.

  • Made in the USA
  • The installation process is very easy
  • For comfort and safety, it provides you the lots of padding
  • It is very expensive

”Can you use the harness for a child up to 59 inch tall?”

The maximum harnessed height is 58″, and booster mode allows up to 62.


10. Maxi Cosi Pria 70 Review


  • This seat provides you the FlexTech feature for the safety
  • Slim design with dual integrated cup holders.
  • It comes with the side-impact protection
  • LATCH Isofix system is also included
  • Cover and harness, both are machine washable

The Maxi Cosi Pria 70 narrowest booster seat is designed to place babies looking back (4 to 18 kg) with the TintyFit system and looking forward when they are older (up to 32 kg). Airprotec technology, an advanced air mattress system that protects the baby’s head.

Both positions benefit from the side protection system. Perfect one-hand insert harness and adaptable headrest for a secure and personalized fit.

Air Protect Side Impact Protection of this narrowest booster seats on the market: Advanced air mattress system protects your child’s head, where it is most needed in a side-impact crash. The seat pad and harness cover are removable with simple snaps, and there is never a need to uninstall the seat or re-thread the harness to get the pad in and out.

Unlike most car seats, the Maxi Cosi 70 narrow booster seats cover and harness are both machines washable and tumble dry. Perfect Fit height adjustment of the harness with one hand with micro-adjustments for an optimized fit. An integrated cup holder safely holds drinks during the trip.

Maxi Cosi 70 slimmest booster seat comes with the deep recline adjustment for easy installation and positioning of the baby in the backward-facing position.

Maxi Cosi Pria 70 narrow booster seats LATCH Isofix system. The LATCH system can only be used on vehicles that have LATCH anchor bars installed in designated LATCH seating positions or are attached to the Isofix system of the car. It can also be used with the adult seat belt.

  • It comes with the soft fabric
  • You can easily adjust this seat in 3 different recline positions
  • Maxi Cosi Pria 70 comes with a lot of padding and cushions
  • In the front and back seat, it provides you the too many extra rooms
  • It’s hard to open the buckle


How to choose the Right Narrow Booster Car Seats

For families with at least three youngsters or families that lean toward a littler vehicle, narrow car seats and narrow booster seats are basic to fit everybody in the vehicle. In any case, looking through all the items in the market to locate the correct limited seats might be a test.

Think about the most extreme width, value, wellbeing evaluations, and client appraisals while choosing a tight car seat or narrow booster seat.

These narrow booster seats speak to one of the best wellbeing instruments for youngsters in vehicles, having the option to stay away from minor harms and wounds in a moderate mishap. So it is a basic component in the daily practice of any family with small kids.

In the accompanying articles, you can locate the best choices in the market, what you should search for and what are the best-limited supporter seats. Here we will mention to you what you need so you can settle on a superior buy choice.

Decide what number of car seats you need to modify in your vehicle. You can modify 2 narrow booster seats that are 17 inches wide. Essentially, you can have 3 kid car seat arrangements by changing 3 narrowest booster seats that are 16 inches wide.

First the most significant:

An infant car seat is fundamental and must be on all the arrangements of future guardians. Today, all narrowest booster infant seats must fulfill certain wellbeing guidelines, so you can feel quiet that your youngster will be protected and make sure about in the car.

Recall that you will utilize the infant seat as often as possible, so discovering one that is anything but difficult to introduce and make sure about is significant. A few seats have pointers to affirm that it is accurately introduced and leveled.

Not all narrowest booster seats are suitable for all children. It is critical to consider your age and size to figure out which is the correct seat and which best accommodates your infant. Later we will discuss the various sorts of seats and which one is best for your little one.

Booster Seats:

At the point when youngsters can breeze through the 5-advance assessment and have outgrown front oriented harness seats, they sit in a high-supported booster seat.

The youngster is belted in utilizing the vehicle’s safety belt which is strung through a guide, called a belt positioner or agent. The positioners ensure the lap belt falls over the kid’s hips, not the mid-region or thighs. It additionally puts the shoulder belt seat over the chest and shoulder, not the neck.

High-back supporters have head and middle assurance. The more up to date seats are entirely movable, where the side insurance can go here and there as well as extend to be smaller or more extensive to suit the kid’s size.


Vehicle seat manufacturers realize that guardians have small cars and they’ve been adding highlights to make the seats fit better.

Look for

  • Collapsible cup holders, those that squish in when not being utilized
  • Straight sides
  • Seats that are tight at the base yet might be more extensive higher up
  • Newborn child seats without a lip that sticks out on the sides

Movable seats like the creative hello there crease

Baby Narrow Booster Seat, Child Or Lift Seat – What Should You Pay Attention To?

narrow harness booster

There are different types of baby seats that adapt to different circumstances: Children, convertibles or elevators. The choice of one of these should be based on user needs and personal preferences. We tell you in detail about these types of chairs so that you are properly informed.

Regular chair:

These are probably the most common models available in the market and are particularly designed for newborn babies or young children. These are installed in such a way that the baby is turning backward, and it is recommended to have a maximum weight of 15 Kg.

Narrow Booster Seat:

These are similar to child seats, but they have the peculiarity that they can be installed so that the child is turning either backward or forwards. The recommendation is that the turning back position is used with babies or children weighing between 2 and 20 kg.

Lift chair:

This, rather than a chair, is a platform that works to raise the child to the height necessary for the car’s seat belt to be properly placed on its body. This is recommended for children weighing between 13 and 55 kilograms.

Purchase criteria:

Factors that allow you to compare and rate the different models of baby chairs:

Choosing a car seat for babies is difficult. There are so many options on the market that it can be overwhelming to select one, especially when your baby’s safety is at stake. In fact, the safest car seat is one that fits the child, fits your vehicle and installs easily with ease.

Not all car seats are suitable for all children or babies. It is important to take into account the age and size of your child to be able to analyze which of the different types of chair is indicated. We recommend paying attention to additional features to make a better purchase:

  • Size
  • Easy to use
  • Cleaning
  • Anchoring system
  • Comfort
  • Side impact protection
  • Size

What you should check for size is that it fits in the car model you have, since not all chairs fit all cars. Some chairs can be very tight, leaving little room for the legs of the child, or complicated to properly adjust the seat belt.

You should measure the space in the back seat of your car, taking into account the space that the child will have for his legs and that you should leave room for someone else to sit next to you. Then you must contrast it with the measures of the seat that are indicated on the packaging. Ideally, they exceed at least 15 cm in each direction.

Easy to use:

The baby car seat will be one of the items you will use most frequently, so it is essential that it be easy to use and do not get into daily complications. So look for chairs with manuals and simple and clear instructions; that have buttons and/or labels that are intuitive and easy to follow and understand.

And for ease, we are not only referring to the simplicity of installing the chair in the car, but also to how easy it is to secure the baby and remove it from the chair. It is important that removing it from the seat is not too complex, especially in case of an emergency where you should quickly get away from the car.


Your baby is likely to eat in his chair more than once, so he can get dirty frequently. The ideal is to have a seat with removable cover and that you can either wash by hand or throw in the washing machine making cleaning much easier. Chairs with vinyl seats are also recommended as you can clean it with a cloth.

Anchoring system:

For more than 15 years, all baby car seats have been compatible with the Lower Anchors and Child Straps (LATCH) system. This system allows you to fasten the chair directly to the car, instead of using the seat belt to secure it.

This system is much easier to install and use. If you do not have this anchor system, no problem, the chair is equally safe. It is important to read the manual in detail with installation instructions. Remember that the car seat is safe as long as it is installed correctly.


It is important that the seat is padded and comfortable for your baby. You should also have additional support for your head, preventing it from moving from side to side with ease while driving.

The space in your legs is also important. Some chairs are very sturdy or large for certain cars, which position the baby too close to the front seat, which gives your baby’s legs little mobility and likewise may be unsafe at the time of an impact.

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