Helmet Sizing

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ADULT HELMET SIZE HEAD CIRC. (IN) HEAD CIRC. (CM) HAT SIZE
XS 20 7/8″ – 21 1/4″ 53cm – 54cm 6 5/8 – 6 3/4
SM 21 5/8″ – 22″ 55cm – 56cm 6 7/8 – 7
MD 22 3/8″ – 22 3/4″ 57cm – 58cm 7 1/8 – 7 1/4
LG 23 1/4″ – 23 5/8″ 59cm – 60cm 7 3/8 – 7 1/2
XL 24″ – 24 3/8″ 61cm – 62cm 7 5/8 – 7 3/4
XXL 24 3/4″ – 25 1/4″ 63cm – 64cm 7 7/8 – 8
YOUTH HELMET SIZE HEAD CIRC. (IN) HEAD CIRC. (CM) HAT SIZE
Youth SM 19 1/2″ – 20″ 50cm – 51cm 5 7/8 – 6 1/8
Youth MD 20″ – 20 1/2″ 51cm – 52cm 6 1/8 – 6 3/8
Youth LG 20 1/2″ – 21″ 52cm – 53cm 6 3/8 – 6 5/8


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ADULT HELMET SIZE HEAD CIRC. (IN) HEAD CIRC. (CM)
XS 20.87 – 21.26 53cm – 54cm
SM 21.65 – 22.05 55cm – 56cm
MD 22.44 – 22.83 57cm – 58cm
LG 23.23 – 23.62 59cm – 60cm
XL 24.02 – 24.41 61cm – 62cm
XXL 24.80 – 25.20 63cm – 64cm
XXXL 25.60 – 26.00 64cm – 65cm
YOUTH HELMET SIZE HEAD CIRC. (IN) HEAD CIRC. (CM)
Youth SM 19.15 – 19.50 49cm – 50cm
Youth MD 20.10 – 20.45 51cm – 52cm
Youth LG 20.87 – 21.26 53cm – 54cm


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ADULT HELMET SIZE HEAD CIRC. (IN) HEAD CIRC. (CM)
XXS 21 1/8 53
XS 21 1/4 54
SM 21 5/8 55
MD 22 3/8 57
LG 23 1/8 59
XL 23 1/2 60
XXL 24 61


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ADULT HELMET SIZE HAT SIZE
XXS 6 3/8- 6 1/2
XS 6 5/8 – 6 3/4
SM 6 7/8 – 7
MD 7 1/8 – 7 1/4
LG 7 3/8 – 7 1/2
XL 7 5/8 – 7 3/4
XXL 7 7/8 – 8
XXXL 8 1/8- 8 3/4
YOUTH HELMET SIZE HAT SIZE
Youth SM 6 1/8- 6 1/4
Youth MD 6 3/8- 6 1/2
Youth LG 6 5/8- 6 3/4
Youth XL 6 7/8- 7