Kart Bay Motorcycle Helmet Sizing Chart
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1Motorcycle Helmet Sizing Chart
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
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
Auto Helmet Sizing Chart
ADULT HELMET SIZE
HEAD CIRC. (IN)
HEAD CIRC. (CM)
HAT SIZE
XXS
21 1/4" - 21 5/8
54cm - 55cm
6 3/4 - 6 7/8
XS
22
56cm
7
SM
22 3/8"
57cm
7 1/8
MD
22 3/4" - 23 1/8"
58cm - 59cm
7 1/4 - 7 3/8
LG
23 1/2" - 23 7/8"
60cm - 61cm
7 1/2 - 7 5/8
XL
24 1/4"
62cm
7 3/4
M3 XTRA 8
25 1/8" - 25 1/2"
64cm - 65cm
8
M3 XTRA 8 1/4
25 7/8" - 26 1/4"
66cm - 67cm
8 1/4
M3 XTRA 8 1/2
26 3/8"
68cm
8 1/2
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