Helmet Size Chart
Adult Helmets
Size
X-Small
Small
Medium
Large
X-Large
XX-Large
Centimeter
52-54 cm
55-56 cm
57-59 cm
59-60cm
61- 62 cm
63 cm
Inches
20 1/2 - 21 1/4
21 5/8 - 22
22 3/8 - 23 3/4
23 1/8 - 23 1/2
24 - 24 3/8
24 3/4
Hat Size
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
Sizing information is provided by the manufacturer and does not guarantee a perfect fit. Please use this chart as a guide only.