Helmet Sizing Tips

1. You should start by wrapping a measuring tape around the largest part of your head about a half-inch above your eyebrows.

2. A helmet needs to be snug so it doesn't come off if you crash.  You will need to pull the tape comfortably tight in order to achieve the best results.  If it is to tight though, the helmet will be uncomfortable.

3. Make sure you get precise results by measuring two to three times trying to get the same result every time. If you get different measurements take the largest one.  If between sizes, choose the next larger size. Helmet should fit snugly but not overly tight.   The helmet will fit a little tight when you first try it on, but will conform to your head with wear.
 
Zox Sizing Chart

Helmet Size	Centimeters	Inches	Hat Size
Small	55 - 56 cm	21" - 21 5/8"	6 3/4 - 6 7/8
Medium	57 - 58 cm	21 3/4" - 22 3/8"	7 - 7 1/8
Large	59 - 60 cm	22 1/2" - 23 1/8"	7 1/4 - 7 3/8
X-Large	61 - 62 cm	23 1/4" - 24"	7 1/2 - 7 3/8
XX-Large	63 - 64 cm	24 1/8" - 24 7/8"	8 - 8 1/8