Product details

1. Durable ABS hardshell for protection and EPS foam liner for security
2. Size small fits circumference 48 cm - 54 cm and hat sizes 6 1/2 - 6 3/4
3. Size medium fits circumference 55 cm - 58 cm and hat sizes 6 7/8 - 7 1/4
4. Size large fits circumference 59cm - 61cm and 7 3/8 - 7 5/8
5. Small size generally fits children while medium and large sizes fit adults