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Comp Helmet Size MarkCE Liner (Pro-Dry Size Mark) Circumference (cm)Circumference (in)Hat Size
XSYS5120 1/86 3/8
XSYL5320 1/26 1/2
SS-M5521 5/86 7/8
MS-M56227
MM-L5722 3/87 1/8
LM-L5822 3/47 1/4
LM-L5923 1/87 3/8
XLL-XL6023 1/27 1/2
XLL-XL60.523 7/87 5/8
XLL-XL61.524 1/47 3/4

To determine your helmet size simply measure the circumference of your head above your ears and around your forhead.

These helmets run large. If you are to the lower side of a range, we recomend sizing down.