My Babiie iSize Car Seats
My Babiie are excited to be launching our new range of iSize Car Seats this year! To stay up to date with product launches and news please Sign up to our Newsletter (at the bottom of the page) or follow our Social Media accounts.
iSize R129 Car seats explained
ECE R129 (i-Size) is the most recent safety Regulation controlling the manufacture of children’s car seat which was introduced in 2013. The intention was to make child car seats easier to fit, provide better protection from side impact and keep children rear facing for longer (this is considered the safest mode of transporting children).
ECE R129 (i-Size) car seats are the newest standard of car seat safety and force the industry to adhere to the highest of safety standards. ECE R44/04 is an older set of safety standards and it is being phased out by a new wave of ECE R129 (i-Size) car seats.
What are the advances in technology?

ECE R44 | ECE 129 |
Classification based on child’s weight (in kg) | Classification based on child’s height (in cm) |
Categorised by groups (Group 0+, 1, 2, 3) | No Groups |
Child can be forward facing from 9 kg | Child must rear face to a minimum of 15 months |
Can be used for seat belt or ISOFIX seats | Can be used for seat belt or ISOFIX seats |
Rear and front impact testing |
Rear, front and side impact testing |
P dummy used in crash tests with 4 sensors |
Q dummy used in crash tests with 32 sensors |
Difference between the two models
You choose the seat depending on your child's height, not weight. This can make things safer as most parents know the height of their child better than the weight. You'll find it easier to ensure your child is in the right size seat.
It is considered the safest standard with improved head and neck protection.
Side-impact crash test results are assessed as part of the standard.
You have to use ISOFIX, which attaches the car seat directly to your car’s chassis, with an i-Size car seat. ISOFIX car seats are more likely to be correctly fitted in your vehicle. Bare in mind that you need an additional ISOFIX base to install a baby car seat using ISOFIX.
Car seat age guide
Child's Height | Group | Child's weight | Approx. age range | |
---|---|---|---|---|
40-87 cm | Group 0+ | Birth up to 13kg/29lb | Birth up to 15 months | BROWSE RANGE |
40-150 cm | Group 0+/1/2/3 | Birth-36kg/79lb | Birth up to 12 years | BROWSE RANGE |
76-150 cm | Group 1/2/3 | 9kg/19lbs to-36kg/79lb | 9 months to 12 years | BROWSE RANGE |
100-150 cm | Group 2/3 | 15kg/33lbs to 36kg/79lb | 4 to 12 years | BROWSE RANGE |
135-150 cm | Group 3 | Max weight 36kg/79lbs | 6 to 12 years | BROWSE RANGE |