
i-Size: Enhanced Car Safety for Children
08/10/2025

i-Size: Enhanced Car Safety for Children
08/10/2025
i-Size: A New Standard for Child Car Safety
In the constant quest for greater safety for our little ones during car journeys, the i-Size regulation has emerged as a beacon of innovation. But what makes i-Size a true game-changer in child car safety?
In this article, we’ll explore its origin, core principles, and impact on children’s protection.
What is i-Size?
i-Size is a European car seat approval standard that forms part of the ECE R129 directive.
This evolving regulation ensures maximum safety for children by introducing stricter requirements compared to previous standards.
Implementation of i-Size: A New Era in Safety
Introduced in 2013, its main goal is to improve child protection in the event of an accident — particularly in side-impact collisions — reducing the risk of head and neck injuries.
In 2017, Phase 2 was introduced, covering car seats for children between 100 and 150 cm tall.
In 2020, Phase 3 was launched, addressing car seats for children between 60 and 105 cm.
Why Was i-Size Created?
i-Size promotes the use of Isofix, a system that makes installation easier and safer.
It also requires that children travel rear-facing until at least 15 months of age, which is considered the safest position.
Unlike previous standards, i-Size classifies car seats based on height and age rather than weight, making it simpler for parents to choose the most suitable and secure seat for their child.
Who Developed i-Size?
The legislation was created by a consortium of safety experts, automotive manufacturers (including Audi, Ford, Mercedes, Renault, Volvo), car seat brands such as Britax, Cybex, and Maxi-Cosi, and ANEC (the European Consumer Association), along with several road safety institutions.
This ensured a comprehensive and informed approach to child safety.
i-Size vs ECE R44: What’s the Difference?
The i-Size regulation operates alongside the ECE R44/04 standard, whose sale will only be allowed until 1 September 2024.
Although i-Size does not directly replace ECE R44, it introduces complementary measures that significantly raise child safety standards.
Benefits of Rear-Facing Travel
Travelling rear-facing is the safest way to transport children in a car.
This position protects the head, neck, and spine in the event of a crash.
While i-Size requires rear-facing until 15 months, it is recommended to maintain this position as long as possible, provided the car and seat allow it.
Conclusion
The introduction of i-Size marks a milestone in child car safety.
Understanding its principles and advantages is essential for all parents who wish to prioritise their child’s protection.
With i-Size, car journeys become safer and calmer, offering the best possible security for your little ones.
References
Explicação das regras de segurança de cadeiras auto: O que é a R129/i-Size? | Maxi-Cosi™ – Car Seats, Pushchairs & More.
CYBEX | What is i-Size? | CYBEX Online Shop – Buy Strollers & Car Seats Online.