Our Little Nutty kids helmets have a Spin Dial in the back for maximum comfort and the Nutcase magnetic buckle for one-handed operation and, best of all, no pinching! Please note: Little Nutty comes in a single size, XS, and generally fits children aged 2 to about 6 or 7 years old. Please measure your child's head before ordering, if at all possible. If Little Nutty is too small on your child, please consider our Street helmets. The adult size S is the next size up. If Little Nutty is too big on your child, please consider our Baby Nutty helmets.