When choosing helmets, as a rule, one parameter is valuable:

• head circumference (cm): horizontal circumference around head.

The peculiarity of choosing a helmet size for hockey, motorsports or other sports is that ranges of head circumference values for the same standard size (e.g. S, L, M, etc.), but for different helmet versions are not always the same.

Important: more information on the main brand sizes is available at links below.