Size Chart - Giro Helmets

This Giro Helmet size chart are meant to serve as a guide. We recommend trying on your helmet instore before riding to ensure the best comfort and performance. 

Adult Helmets

Size	S	M	L	XL
Head Circumference	51-55cm	55-59cm	59-63cm	63-64cm

Adult Universal Helmets

SIZE	HEAD CIRCUMFERENCE
Universal Womens	50-57cm
UA = Universal Adult	54-61cm
XL = Universal XL	58-65cm

Kids Helmets

SIZE	HEAD CIRCUMFERENCE
XS (Scamp model)	45-49cm
S (Scamp model)	49-53cm
XS (Dime model)	47-51cm
S (Dime model)	51-55cm
Universal Child	47-54cm
Universal Youth (Ages 5+)	50-57cm