Size Chart (Helmets)

Fit Guide

Size Inches CM Hat Size
 SMALL 21.25 - 22.5 in 54-57 cm 6 3/4 - 7 1/8
MEDIUM 22.5 - 23.25 in 57-59 cm 7 1/8 - 7 3/8
LARGE 23.25 - 24.5 in 59-62 cm 7 3/8 - 7 3/4

If you are unsure of your size, please contact support@bluejaybikes.com and we will help you figure it out.