Sizing Chart:

Size is determined by your head's circumference (see our size chart below in inches):
Step 1 - Use a paper tape measure or a piece of string.
Step 2 - Wrap the tape measure or string around your head at its largest circumference - usually just above your eyebrows in front, over your ears and around in back - then mark.
Step 3 - Measure with ruler (if using string).

X-Small (XS) = 19 1/8" - 20"
Small (S) = 20 1/8" - 21"
Medium (M) = 21 1/8" - 22"
Large (L) = 22 1/8" - 23"
X-Large (XL) = 23 1/8" - 24"
XX-Large (XXL) = 24 1/8" - 25"