Our son has a head circumference of 51.5 cm and it fits the helmet perfectly. He can be continuously adjusted to the chin straps and at the back there is a small wheel, which allows you to adjust the helmet perfectly to the head. The helmet is also very light, so it does not interfere with the small. He also does not sweat underneath. The crocodile comes with him also very well received. From Stiftung Warentest he is "good" with.
