About This Product
Airius Half Shell Bicycle Helmet.
SIZE CENTIMETER HAT SIZE INCHESXS 53-54 6 5/8-6 3/4 20 7/8-21 1/4
S 55-56 6 7/8-7 21 5/8-22
M 57-58 7 1/8-7 1/4 22 1/2-22 7/8
L 59-60 7 3/8-7 1/2 23 1/4-23 5/8
XL 61-62 7 5/8-7 3/4 24-24 3/8