Giro Helmet Size Chart

Cycling Helmets
Size	Circumference (cm)
XS	47 - 51
S	51 - 55
M	55 - 59
L	59 - 63
XL	61 - 65
Universal Men	54 - 61
Universal Women	50 - 57

Youth Cycling Helmets
Size	Circumference (cm)
XS	45 - 49
S	49 - 53
Universal	50 - 57

Ski Helmets
Size	Circumference (cm)
XS	48.5 - 52
S	52 - 55.5
M	55.5 - 59
L	59 - 62.5
XL	62.5 - 65

Sizing information is provided by the manufacturer and does not guarantee a perfect fit. Please use this chart as a guide only.