GMax Helmets Size Charts

Adult Helmet

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Size	Circumference (cm)	Circumference (in)	Hat Size (inch)
2XS	51 - 52	20 1/16 - 20 7/16	6 3/8 - 6 1/2
XS	53 - 54	20 7/8 - 21 1/4	6 5/8 - 6 3/4
S	55 - 56	21 5/8 - 22	6 3/4 - 7
M	57 - 58	22 7/16 - 22 13/16	7 1/8 - 7 1/4
L	59 - 60	23 1/4 - 23 5/8	7 3/8 - 7 1/2
XL	61 - 62	24 - 24 3/8	7 5/8 - 7 3/4
2XL	63 - 64	24 13/16 - 25 3/16	7 7/8 - 8
3XL	65 - 66	25 5/8 - 26	8 1/8 - 8 1/4
4XL	67 - 68	26 3/8 - 26-3/4	8 3/8

Youth Helmet

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Size	Circumference (cm)	Circumference (in)	Hat Size (inch)
S	49 - 50	19 5/16 - 19 11/16	6 1/8 - 6 1/4
M	51 - 52	20 1/16 - 20 7/16	6 3/8 - 6 1/2
L	53 - 54	20 7/8 - 21 1/4	6 5/8 - 6 3/4

To find the correct size helmet for a persons's head:
Measure the head circumference one-inch above the eyebrows and ears.
Using the circumference measured, use the chart to find the approximate size.
Have the person try the helmet on and see if it feels snug equallly around the head. The helmet should not feel too tight or too loose at any point around the head.

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