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Child seats according to standard R129/i-Size for small children (87-105 cm)

The safety of your children during car journeys is a top priority. With the R129 standard, also known as i-Size, the European Union introduced stricter requirements for child seats to improve the protection of children on the road. Here you can find out everything you need to know about i-Size child seats for infants with a height of around 87-105 cm.

What is the R129/i-Size standard?

The R129/i-Size is a new safety standard for child car seats that has been gradually introduced since mid-2013. Among other things, it stipulates that:

  • Child seats are selected according to the height rather than the weight of the child.
  • child seats are better adapted to the current state of vehicle safety technology.
  • All i-Size child seats must offer side impact protection.
  • child seats must also have an Isofix attachment, which facilitates correct installation.

Selection criteria for child seats (87-105 cm height)

Height and weight

Although i-Size classifies by height, it is helpful to also consider the weight of the child as this affects the firmness of the seat. Standard R129 seats are usually designed for children up to a certain height and weight limit.

Isofix attachment

i-Size child seats are anchored using Isofix, a system based on fixed connection points in the vehicle body. Check whether your vehicle has Isofix anchorages and whether these are suitable for your child seat.

Reclining position

A multi-adjustable sitting or reclining position is particularly important for younger toddlers to prevent them from tilting their heads forward during the journey, especially if they fall asleep.


An adjustable headrest is crucial so that the child seat can "grow" with your child. This should be easy to adjust and adapt to the size of your child.

Side impact protection

An integral part of i-Size seats is improved protection in the event of side collisions. So make sure that the seat has sufficient side impact protection.

Material and upholstery

The seat should be made of high-quality, durable materials and have comfortable padding so that your child is comfortable and safe even on longer journeys.

Belt guide and system

A 5-point harness system is the safest way to secure the child in the seat. Make sure that the belts are easy to adjust and cannot twist.

Operation and comfort

A good child seat should be easy to operate to ensure quick and uncomplicated buckling up. Comfort aspects such as a soft cover that is easy to clean also play an important role.

Assembly and use

Follow the instructions for use carefully. If you purchase a child seat, ask someone to show you how to install it correctly when you first use it. You should check it after installation:

  • The seat should be installed firmly and without excessive play.
  • The straps should be adjusted to the correct tension so that you cannot put more than one finger between the strap and the child.
  • The diagonal belt should run across the middle of the shoulder and never run along the neck or arm.

Further tips

  • Do not buy a used child seat if its history is unknown. Damage is not always visible.
  • Register your child seat with the manufacturer for product recalls.
  • Check the approval label to ensure that the seat is suitable for the vehicle.
  • Child seats should be replaced after an accident, even if there is no visible damage.


A safe child seat is an investment in the safety of your child. Take the time to compare models and install the child seat correctly. Remember that every child and every car is different, so there is no one perfect child seat for everyone. Professional advice and careful research can help you find the right seat for your child and your vehicle.