Skip to content
UK DE
Compare products

Buying Guide Car seats

Car seat buying guide: i-Size and UK law

Quick answer

Choose an i-Size (R129) seat with ISOFIX and keep your child rear-facing as long as possible.

We research products independently. When you buy through links on this page, we may earn a commission at no extra cost to you. How we earn money

UK law

Children must use a car seat until they are 12 years old or 135 cm tall.

i-Size

R129 is the latest safety standard.

ISOFIX

Reduces fitting mistakes.

Rear-facing

Safer for longer.

Buying in the UK

UK law requires children to use a car seat until 12 years old or 135 cm tall.

Frequently asked questions

What is i-Size?

The latest UK/EU standard, R129.

Until when?

12 years or 135 cm.

Buyrskip Editorial Team

Part of the Buyrskip research team. We compare specifications, documentation and real-world trade-offs so you can decide faster.