Zox Helmet Size Charts

Adult

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Size	Inches	CM	Hat Size
2XS	20 1/8 - 20 1/2	51 - 52	6 3/8 - 6 1/2
XS	20 7/8 - 21 1/4	53 - 54	6 5/8 - 6 3/4
S	21 5/8 - 22	55 - 56	6 7/8 - 7
M	22 1/2 - 22 7/8	57 - 58	7 1/8 - 7 1/4
L	23 1/4 - 23 5/8	59 - 60	7 3/8 - 7 1/2
XL	24 - 24 3/8	61 - 62	7 5/8 - 7 3/4
2XL	24 3/4 - 25 1/2	63 - 64	7 7/8 - 8
3XL	25 5/8 - 26	65 - 66	8 1/8 - 8 1/4
4XL	26 3/8 - 26 3/4	67 - 68	8 3/8 - 8 1/2
5XL	27 1/8 - 27 1/2	69 - 70	8 5/8 - 8 3/4

How to Measure
Measure the largest portion of your head horizontally with a cloth tape, measuring approximately one inch above your eyebrows and ears. If your head size is between two helmet sizes, first try the smaller size. A correctly fitting helmet should not be able to move from side to side and up and down with the chinstrap fastened for a safe fit. If it is not snug, try a size smaller.
Consider purchasing other size cheek pads or helmet liners to improve fit. Some helmets are designed with exchangeable cheek pads and liners; allowing smaller cheek pads or liners, in a slightly larger helmet or visa versa.

Sizing information is provided by the manufacturer and does not guarantee a perfect fit. Please use this chart as a guide only.