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HJC Helmet Sizing Chart

ADULT HELMETS
SIZE CM HAT SIZES INCHES
2X-SMALL 51-52 6 3/8 - 6 1/2 20 - 20 1/2
X-SMALL 53-54 6 5/8 - 6 3/4 20 7/8 - 21 1/4
SMALL 55-56 6 7/8 - 7 21 5/8 - 22
MEDIUM 57-58 7 1/8 - 7 1/4 22 1/2 - 22 7/8
LARGE 59-60 7 3/8 - 7 1/2 23 1/4 - 23 5/8
X-LARGE 61-62 7 5/8 - 7 3/4 24 - 24 3/8
2X-LARGE 63-64 7 7/8 - 8 24 3/4 - 25 1/4
3X-LARGE 65-66 8 1/8 - 8 1/4 25 5/8 - 26

YOUTH HELMETS
SIZE CM HAT SIZES INCHES
YOUTH SMALL 49-50 6 1/8 - 6 1/4 19 1/4 - 19 3/4
YOUTH MEDIUM 51-52 6 3/8 - 6 1/2 20 - 20 1/2
YOUTH LARGE 53-54 6 5/8 - 6 3/4 20 7/8 - 21 1/4
YOUTH SMALL/MEDIUM 49-50 6 1/8 - 6 1/4 19 1/4 - 19 3/4
YOUTH LARGE/X-LARGE 51-52 6 3/8 - 6 1/2 20 - 20 1/2
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