Buy for my 18 month old son who falls often climbing back everything it finds. It is a little high on its oreilles.Pas enough wrapping on the back of the head. Nevertheless he rule easily. It is light. And rather fulfills its role. May be the creation of a second helmet for 18m + would be ideal. I think when the headband is 52cm the maximum size of the helmet. It will cover over much. But hey it still helps to avoid big bobos for now.