What Is i-Size? (ECE R129)
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What Is i-Size? (ECE R129)

What is i-Size?

i-Size, also known as ECE R129 is a new European child car seat regulation introduced in July 2013.

It is designed to keep children rear-facing for longer, provide better side impact protection and make car seats easier to fit correctly.

The main changes of i-Size (ECE R129) compared to ECE R44:

  • Babies in i-Size car seats stay rearward-facing until they are at least 15 months old
    The back of car seat will absorb most of the impact while supporting the baby's delicate head, neck and spine.
  • Side impact test
    i-Size includes a side impact test to ensure that the seats provide better protection from side impact collisions.

  • Requires ISOFIX fitting
    i-Size currently requires the use of ISOFIX (with support leg or top tether only) to fit your car seat – not seat belts. It reduces the risk of incorrectly installing the car seat.
  • New child test dummies used
    A new type of more innovative crash test dummy is being used to test i-Size car seats. The new version has more sensors, higher sensitivity and better reflects how a child’s body would react in an accident.

How can I tell if a car seat is i-Size? 

To find out if a car seat reaches the i-Size regulations, check the orange label.