Seller notes

GMAX Helmet Size Chart GMAX Helmet Size Chart Sizes U.S. Hat Size Inches Centimeters Youth Small 6 1/8 - 6 1/4 19 5/16 - 19 11/16 49 - 50 Youth Medium/XXS 6 3/8 - 6 1/2 20 1/16 - 20 7/16 51 - 52 Youth Large/XS 6 5/8 - 6 3/4 20 7/8 - 21 1/4 53 - 54 Small 6 3/4 - 7 21 5/8 - 22 55 - 56 Medium 7 1/8 - 7 1/4 22 7/16 - 22 13/16 57 - 58 Large 7 3/8 - 7 1/2 23 1/4 - 23 5/8 59 - 60 X-Large 7 5/8 - 7 3/4 24 - 24 3/8 61 - 62 2X-Large 7 7/8 - 8 24 13/16 - 25 3/16 65 - 66 3X-Large 8 1/8 - 8 1/4 25 5/8 - 26 6...

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