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HJC C10 Helmet Sizing

Smaller sizes of the HJC C10 Helmet are designed to fit youth riders. Sizes 3XS and 2XS are comparable to other youth-specific HJC helmets in sizes SM and MD, respectively. See size chart for details.
Size Head (cm)
3XS / Youth SM 50-51
2XS / Youth MD 52-53
XS 54-55
SM 55-56
MD 57-58
LG 58-59
XL 60-61
2XL 62-63

Sizing information is provided by the manufacturer and does not guarantee a perfect fit.

How to Measure

  • H Head
    Wrap a cloth measuring tape around your head just above your eyebrows and ears. Pull the tape comfortably snug, read the length, repeat for good measure and use the largest measurement.