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Size Charts for Triple 8 Helmets

 

 

Adult

US Size Inches
X-Small 20 1/10 - 20 1/2
Small 20 3/5 - 21 1/3
Medium 21 2/5 - 22
Large 22 1/10 - 22 9/10
X-Large 23 - 24

 

 
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