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Sedici Adult Helmet Sizing

Size Head (in)
XS 20.9-21.3
SM 21.7-22.0
MD 22.4-22.8
LG 23.2-23.6
XL 24.0-24.4
2XL 24.8-25.2
3XL 25.6-26.0

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.