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Motorcycle Helmet Size Chart

Adult Sizes

Helmet SizesHead Circumference - InchesHead Circumference - MetricHat Sizes
2XS 18 1/8 - 19 in 46 - 49 cm 5 7/8 - 6
XS 19 1/8 - 20 in 49 - 51 cm 6 1/8 - 6 1/4
S 20 1/8 - 21 in 52 - 54 cm 6 3/8 - 6 1/2
M 21 1/8 - 22 in 54 - 56 cm 6 5/8 - 6 3/4
L 22 1/8 - 23 in 57 - 59 cm 6 7/8 - 7
XL 23 1/8 - 24 in 59 - 61 cm 7 1/8 - 7 1/4
2XL 24 1/8 - 25 in 62 - 64 cm 7 3/8 - 7 1/2
3XL 25 1/8 - 25 3/4 in 64 - 65 cm 7 5/8 - 7 3/4
4XL 25 7/8 - 26 1/4 in 65 - 66 cm 7 7/8 - 8

Child Sizes

Helmet SizesHead Circumference - InchesHead Circumference - MetricHat Sizes
S 17 5/8 - 18 in 45 - 46 cm Infant/Toddler
M 18 1/8 - 18 1/2 in 46 - 47 cm Toddler/Youth
L 18 5/8 - 19 in 48 - 49 cm Youth

 

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