Gmax Helmet Sizing Chart
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1Gmax helmet sizing chart
A great deal of effort has been put into making Gmax helmets the best-fitting North American helmet. We ask that you use the following information to help choose
the proper size helmet. In order for a helmet to protect properly and be the most comfortable, it must be sized to your head correctly.
To find the correct size helmet for a person’s head:
(1) Measure the head circumference one-inch above the eyebrows and ears.
(2) Using the circumference measured, use the chart below to find the approximate size.
(3) Have the person try the helmet on and see if it feels snug equally around the head. The helmet should not feel too tight or too loose at any point around the head.
Please remember that all head shapes vary slightly and that this sizing chart is to be used as a starting guide, not an exact guide.
CIRCUMFERENCE
HELMET SIZE
CIRCUMFERENCE
HELMET SIZE
Metric cm
Inches
Letter
Number
Metric cm
Inches
Letter
Number
47 - 48cm
18-7/8” - 19-1/4”
YS
6 - 6-1/8
59 - 60cm
23-5/8” -24”
L
7-1/2 - 7-5/8
49 - 50cm
19-11/16” - 20-1/16”
Yth S/M, YM
6-1/4 - 6-3/8
61 - 62cm
24-3/8” - 24-13/16”
XL
7-3/4 - 7-7/8
51 - 52cm
20-7/16” - 20-7/8”
Yth L/XL, YL, XXS
6-1/2 - 6-5/8
63 - 64cm
25-3/16” - 25-5/8
XXL
8 - 8-1/8
53 - 54cm
21-1/4” - 21-5/8”
XS
6-3/4 - 6-7/8
65 - 66cm
26” - 26-3/8”
XXXL
8-1/4 - 8-3/8
55 - 56cm
22” - 22-7/16”
S
7 - 7-1/8
67 - 68cm
26-1/2” - 26-5/8”
XXXXL
57 - 58cm
22-13/16” - 23-1/4”
M
7-1/4 - 7-3/8
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