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Oakley Helmet Size Chart

MOD 1, MOD 5 & MOD 3 Helmet Sizes

Small Medium Large
51 - 55 cm 55 - 59 cm 59 - 63 cm

MOD 1 Youth

Small Medium
49 - 53 cm 53 - 57 cm

Modular Brim / Goggle Fit Compatibility

Small MOD Brim Large MOD Brim
A Frame 2.0 Airwave
Crowbar Airbrake XL
OS XM Airbrake
O2 XS Flight Deck
E Frame Flight Deck XM
Windjacket 2.0 Canopy
  Line Miner
  O2 XL