GMAX Helmets


 Size IN CM
SM 21 5/8" - 22" 55 - 56
MD 22 7/16" - 22 13/16" 57 - 58
LG 23 1/4" - 23 5/8" 59 - 60
XL 24" - 24 3/8" 61 - 62
XXL 24 13/16" - 25" 63 - 64
XXXL 25 5/8" - 26" 65 - 66
XXXXL 26 3/8" - 26 3/4" 67 - 68