The right size of baby seat is crucial for the safety of the child. The first two groups form the category of baby seats.
Group 0: Suitable for babies weighing 0 - 13 kg (up to approx. 1 year)
Group 0+: Suitable for babies weighing up to 13 kg. (up to approx. 1 1/2 years)
Group I is no longer aimed at babies, but at toddlers.