Helmet Size Chart
| HELMET SIZE | HEAD CIRC. (IN) | HEAD CIRC. (CM) | HAT SIZE |
| XX-Small | 20" - 20 1/2" | 51cm - 52cm | 6 3/8" - 6 1/2" |
| X-Small | 21 1/4" - 21 5/8" | 54cm - 55cm | 6 3/4" - 6 7/8" |
| Small | 21 5/8" - 22" | 55cm - 56cm | 6 7/8" - 7" |
| Medium | 22 1/2" - 22 3/4" | 57cm - 58cm | 7 1/8" - 7 1/4" |
| Large | 22 3/4" - 23 1/4" | 58cm - 59cm | 7 1/4" - 7 3/8" |
| X-Large | 23 5/8" - 24" | 60cm - 61cm | 7 1/2" - 7 5/8" |
| XX-Large | 24 1/2" - 24 3/4" | 62cm - 63cm | 7 3/4" - 7 7/8" |