So what is the law?

By UK law, all children travelling in the front or rear seat of any car, van or goods vehicle must use the correct child car seat or booster seat until they are either 135cm in height or 12 years old, whichever comes first.

For information on child safety regulations in ROI, please refer to

Good Egg Safety conducted a survey of 2,351 children aged 0-11 to find out if kids are using the mandatory booster seats.

Scary but true – only 598 of them had a booster seat. 34 per cent of the children between the ages of 8 and 11 were using an adult seat belt when travelling, which just doesn’t provide the protection they need. More than half of the 93 children aged 2-3 were in the wrong seat for their age, weight or height.

How do I know which car seat group to choose?

There may be more than one car seat group that suits your little one—it all depends on your child’s weight, age and height. If you’re not sure which car seat meets your child’s needs, you can always ask our in-store Baby Experts.

Here’s an overview of the main groups:

Group 0+ (Birth to 13kg)

Rearward facing car seats that can be secured with the adult seat belt or an in-car base. A Group 0+ car seat will even double as a baby carrier. Some models come equipped with ISOFix compatible bases.

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Group 0-1 (Birth to 18kg)

These adapt from rearward to forward facing as your child grows—but we recommend keeping your baby rearward facing up to 18kg. The seat has an integral harness and is secured with the adult seat belt. Some models are ISOFix compatible.

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Group 0-1-2-3 (Birth to 12 Years)

A Group 0-1-2-3 car seat will grow from a newborn-safe travel companion to a high back booster that adjusts in every direction to keep your child comfortable and protected over the years. Some models are ISOFix compatible.

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Group 1-2-3 (9 to 36kg)

Forward facing car seats that grow with your child. From 9 to 18kg, the integral harness keeps your little one secure. From 15 to 36kg, the harness is removed and the adult seat belt is used. Some models are ISOFix compatible.

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Group 2-3 (15 to 36kg)

Forward facing car seats available in high back booster or booster cushion form. Secured using the adult seat belt. Some models are ISOFix compatible.

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And what exactly is iSize?

i-Size (R129) is a European Safety regulation that came into effect in 2013 regarding car seats for children under 105cm in height (approx. 4 years). The categorisation of these seats is based on height and size rather than height and weight.

i-Size car seats for newborns are designed to keep them rearward-facing until they are at least 15 months old, as this is the safest way to travel.

i-Size does not replace the current ECER44/04 standard.

Why choose a rearward-facing car seat? It’s safer.

A baby’s head is 5 times heavier on their body than your head is for you. That’s why your baby needs extra support to protect their head and neck.

Extended rearward facing seats reduce the risk of injury in a head-on collision by more than 73% compared to a conventional forward-facing seat. In an impact, the force is distributed evenly over a larger area rather than being focused on baby’s neck.

Our Baby Experts can help you find out more about the safety benefits of keeping your child rearward-facing for as long as possible with our range of extended rearward-facing seats. Only move your child out of rearward-facing car seats when their head has crowned the top of the seat or they reach the maximum weight outlined by the manufacturer.

How will I know if it’s the right seat for my car?

Once you’ve chosen a car seat that suits your child and your budget, we’ll need to check whether the car seat fits your vehicle. All cars are different, so we check whether your chosen seat is compatible with your vehicle—and we fit it for you, free of charge.*

*Check it Fits service is offered for car seats from manufacturers that provide this fitting list.

ISOFix or belt-fitted?

The choice is yours. Our Baby Experts can check whether your vehicle is ISOFix compatible or whether the seat belt is the only means of securing the car seat to the vehicle.

ISOFix: An international standard of built-in attachment points in a car’s structure, designed to fit a car seat. This is the safest, easiest and quickest way to fit a car seat correctly. ISOFix provides a solid and permanent connection between car seat and car body.

Belt-fitted: A car seat installed using your vehicle’s 3-point seat belt to secure it in place.

Car seat base: Allows safe, quick and easy installation of car seats using ISOFix anchor points or the vehicle seat belt.

For more help installing your car seat, you can watch all of our car seat installation videos here.

Some tech talk explained…

Side impact protection

Deeper side wings ensuring optimum protection should your car be involved in a side-on collision.

Top tether connection

A tether on the back of the car seat at the top. When hooked and tightened to the tether points in your car it helps keep the car seat from tipping forward in case of a crash or sudden stop, providing extra protection.

Support leg

Extends to the vehicle’s floor for extra stability. Please check whether the support leg rests on an under floor storage compartment in your car, as this may be unsafe.


Straps that keep a child secured in the car seat in case of a crash. The safest harness is a 5-point harness that secures the child at the shoulders and hips, and buckles between the legs.

Ready to meet some of our top brands?

When you’re choosing a car seat, there are lots of features to look for alongside safety. Comfort is one of the most important factors for your little one—and Joie is an expert in keeping baby both cosy and protected. For a comfortable i-Size car seat, check out the Joie iSpin 360, which has a soft comfort insert, deluxe cushioning and a 360 spin for your convenience. All this on top of keeping baby rearward facing for as long as possible.

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Innovative car seats have made Maxi-Cosi a trusted companion on family journeys for decades. Experts in safe, comfortable travel, this brand brings you the likes of the Cabriofix Group 0+ Car Seat, a cosy infant carrier with Click & Go installation.

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Cybex combines creative design with rigorous safety standards to develop unique car seats like the Sirona S iSize Group 0-1 Car Seat. This high-quality brand is committed to safety and innovation, offering features like Energy Reduction Technology and extended rear facing.

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