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Helmet Sizes

To provide the best head protection, your helmet needs to fit properly. A helmet should fit snugly on your head without slipping, rubbing, or pinching. Different people have different shaped heads, and not all helmet styles will fit everyone--you might need to try a few different helmets to find one that works for you. If you're not sure about the fit of a new helmet, have your instructor check it before you ride in it.

To determine what size helmet to order, measure the circumference of your head at its biggest point and use the table below to find the corresponding helmet size.

Head Size
(in inches)
Helmet Size
(standard)
Helmet Size
(Lidlocker)
Helmet Size
(International)
19 6 1/4 XS -
19 1/2 6 3/8 XS -
20 6 1/2 S S
20 1/2 6 5/8 S S
21 6 3/4 S S
21 1/2 6 7/8 M S
22 7 M M
22 1/2 7 1/8 M M
23 7 1/4 L M
23 1/2 7 3/8 L L
24 7 1/2 L L
24 1/2 7 5/8 L L
25 7 3/4 - L