Smith Helmet Size Chart

Adult Helmets

Small51 - 55cm
Medium55 -59cm
Large59-63cm
X Large63-67cm


Holt & Junior Helmets 

Youth Small48 - 53cm
Youth Medium53 - 58cm
X Small52 - 54cm
Small54 - 56cm
Medium56 - 58cm
Large58 - 60cm
X Large60 - 62cm