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Current Year Size Chart

Giro Helmet Size Chart - 2011

Adult Helmet SizeSize (CM)
S52-55.5
M55.5-59
L59-62.5
 
 
Youth Helmet Size Size (CM)
S  52-55.5
M 55.5-59
 
 
Kid Helmet SizeSize (CM)
XS / S                      49-52
M / L52-55.5