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Highway 21 Helmet Sizing

Size Head (cm)
SM 55-56
MD 57-58
LG 59-60
XL 61-62
2XL 63-64
3XL 65-66
4XL 67-68
5XL 69-70

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.