Sizing Chart

Helmet Size Hat Size Circumference (cm.) Circumference (in.)
X-Small 6 1/4 - 6 3/4 50.5 - 54 19.75" - 21.25"
Small 6 5/8 - 7 1/8 53 - 56.5 20.75" - 22.25"
Medium 6 7/8 - 7 3/8 55.5 - 59 21.75" - 23.25"
Large 7 1/4 - 7 3/4 58 - 61.5 22.75" - 24.25"