Adult Motorcycle Helmet Sizing Chart

Motorcycle Helmet Sizing Chart (General)

Size=cm
XS=53-54cm
S=55-56cm
M=57-58cm
L=59-60cm
XL=61-62cm
XXL=63-64cm

The cm measurement is the radius of the widest part your head, around your crown. A handy trick for getting this measurement is to use a cable(eg phone charger cable.) to get a lenght and then compare the cable against a measuring tape.