Helmet Size Chart
Adult Helmets
Size
XX-Small
X-Small
Small
Medium
Large
X-Large
XX-Large
XXX-Large
Inches
21 1/8
21 1/4
21 5/8
22 3/8
23 1/8
23 1/2
24 1/4
24 5/8
Centimeter
50 - 52
53 - 54
55 - 56
57 - 58
59 - 60
61 - 62
63 - 64
65 - 66
Hat Size
6 3/8 - 6 1/2
6 5/8 - 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
8 3/8 - 8 1/2
Sizing information is provided by the manufacturer and does not guarantee a perfect fit. Please use this chart as a guide only.