Shark Helmet Size Charts
Adult Helmet
Hat Size
Inches
CM
X-Small
6 1/2 - 6 5/8
20 3/4"
52.7
Small
6 3/4 - 6 7/8
21 1/4"
54
Medium
7 - 7 1/8
22 3/8""
56.8
Large
7 1/4 - 7 3/8
23 1/8"
58.7
X-Large
7 1/2 - 7 5/8
23 5/8"
60
2X-Large
7 3/4 - 7 7/8
24"
61
*Sizing information is provided by the manufacturer and does not guarantee a perfect fit. Please use this chart as a guide only.