Giro Ski hElmet Size Charts
Adult ski Helmets
US Size
Cm
Inches
Small
52-55.5
20 1/2 - 21 7/8
Medium
55.5-59
21 7/8 - 23 1/4
Large
59-62.5
23 1/4 - 24 5/8
XL
62.5-65
24 5/8 - 25 1/2
SIZE
Small
CM
52-55.5
Inches
20 1/2 - 21 7/8
SIZE
medium
Cm
55.5-59
Inches
21 7/8 - 23 1/4
SIZE
Large
CM
59-62.5
Inches
23 1/4 - 24 5/8
SIZE
XL
CM
62.5-65
Inches
24 5/8 - 25 1/2
Kids' ski Helmets
US Size
Cm
Inches
XS-S
49-52
19 1/4 - 20 1/2
M-L
52-55.5
20 1/2 - 21 7/8
SIZE
XS-S
CM
49-52
Inches
19 1/4 - 20 1/2
SIZE
M-L
Cm
52-55.5
Inches
20 1/2 - 21 7/8