Sizing Chart

Helmet Size Hat Size Circumference (cm.) Circumference (in.)
X-Small 6 3/8 - 6 3/4 51 - 54 20" - 21.25"
Small 6 5/8 - 7 53 - 56 20.75" - 22"
Medium 6 7/8 - 7 1/4 55 - 58 21.5" - 22.75"
Large 7 1/8 - 7 5/8 57 - 61 22.25" - 24"