Giro Helmet Sizing Chart

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Giro Helmet Sizing Chart

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Adult Sizes	in	cm
XS	20.5 - 21	52 - 53.5
S	21 - 21.75	53.5 - 55.5
M	21.75 - 22.5	55.5 - 57
L	22.5 - 23	57 - 59
XL	23 - 23.75	59 - 60.5
XXL	23.75 - 24.5	60.5 - 62.5

Youth Sizes
XS/S	19 - 21	49 - 54
M/L	21 - 23	54 - 58
XS	20.5 - 21	52 - 53.5
S	21 - 22	53.5 - 55.5
M	22 - 22.5	55.5 - 57
L	22.5 - 23	57 - 59

Helmet sizing is determined by the distance around your head in centimeters. Measure the circumference of your head just above your eyebrows to determine your correct helmet size.

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