Helmet Size	Head Circumference (cm)
XS-S	51-54
M-L	55-58
XL-XXL	59 - 62
XS	51-52
S	53-54
M	55-56
L	57-58
XL	59-60
XXL	61-62
Cortex DH M-L	55-57
Cortex DH L-XL	58-60

 

Kids' Size	Head Circumference (cm)
Pocito XS-S	51-54
Pocito M-L	55-58