| size | XS | SM | ME | LG | XL | XXL |
| head circumference | 20 3/4-21 1/8" | 21 5/8-22" | 22 3/8-22 3/4" | 23 1/8-23 1/2" | 23 7/8-24 3/8" | 24 3/4-25 1/8" |
| hat size | 6 1/2-6 3/4 | 6 7/8-7 | 7 1/8-7 1/4 | 7 3/8-7 1/2 | 7 5/8-7 3/4 | 7 7/8-8 |
Measure around the head, just above the eyebrows
and around the back, |
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Correct helmet fit is critical.
A helmet should be as snug as possible without giving you a headache.
You can start with your hat size but that is just the beginning. With
the helmet on, chin strap undone and neck held rigid, twist the helmet
left and right to check for excessive play. Then, with the chin strap
on, rock the helmet back then forward to see if it can roll off. Finally,
watch a half-hour TV show with the helmet on. If it feels snug during
these tests but doesn’t give you a headache, you have the right size.