Find your size (cm number = insole length)

Size measurement instructions
SizeS/MM/LL/XLXL/XXL Man OSFAWoman OSFAChildren OSFA
Head size (CM)53 - 5556 - 5859 - 6161,5 - 64 56 - 6054 - 5853 - 57
SizeS/MM/LL/XLXL/XXL Man OSFAWoman OSFAChildren OSFA
Head size (Inches)20⅞ - 21½22 - 2323 - 24¼24¼ - 25½ 22 - 23½21¼ - 22¾20⅞ - 22⅜

How to choose the right size?
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Step 1: Measure yourself

Measure the circumference of the head with a tape measure. Wrap it around your head where the cap will be fitted (about 2-3 cm above the eyebrows).

Step 2: Find your size (cm number = insole length)

Find your size in the following chart. If you are on the borderline between two sizes, choose the smaller size for a tighter, or the larger for a looser fit.