| 509 Helmet Size Chart | |||
|
HELMET SIZE: |
HAT SIZE: (INCHES) |
HEAD CIRCUMFERENCE (INCHES) | HEAD CIRCUMFERENCE (CM) |
| Extra Small (XS) | 6 5/8" - 6 3/4" | 21 1/8 | 54 cm |
| Small | 6 7/8" - 7" | 21 7/8 | 56 cm |
| Medium | 7 1/8" - 7 1/4" | 22 5/8 | 58 cm |
| Large | 7 3/8" - 7 1/2" | 23 1/2 | 60 cm |
| XL | 7 5/8" - 7 3/4" | 24 1/4 | 62 cm |
| XXL | 8" | 25 | 64 cm |