SIZE CHART
Never buy a used helmet or borrow someone else’s helmet.
Over time the protective foam in helmets will adjust to the contours of a user’s head.
A used or borrowed helmet may not offer as much protection as a new helmet.
HELMET SIZE CONVENTION CHART
The size chart is only for reference. Always try the helmet on and follow this manual’s instructions for a proper fit.
SIZE
CM
HAT SIZE
INCHES
XX
51-52
6 3/8 - 6 1/2
20 - 20 1/2
XS
53-54
6 5/8 - 6 3/4
20 7/8 - 21 1/4
S
55-56
6 7/8 - 7
21 5/8 - 2
M
57-58
7 1/8 - 7 1/4
22 1/4 - 22 7/8
L
59-60
7 3/8 - 7 1/2
23 1/4 - 23 5/8
XL
61-62
7 5/8 - 7 3/4
24 - 24 3/8
2XL
63-64
7 7/8 - 8
24 3/4 - 25 1/4
3XL
65-66
8 1/8 - 8 1/4
25 5/8 - 26
4XL
67-68
8 3/8 - 8 1/2
26 3/8 - 26 3/4
HELMET SIZE CHART
RPHA SERIES, FG-JET, i71, i100, i90, i30, i20, i40, C10, C91, C80, V10, V60, V31, V90
SIZE
CENTIMETER
HAT SIZE
INCHES
*3XS
50-51
6 1/4 - 6 3/8
19 3/4 - 20 1/8
2XS
51-52
6 3/8 - 6 1/2
20 - 20 1/2
XS
53-54
6 5/8 - 6 3/4
20 7/8 - 21 1/4
S
55-56
6 7/8 - 7
21 5/8 - 2
M
57-58
7 1/8 - 7 1/4
22 1/4 - 22 7/8
L
59-60
7 3/8 - 7 1/2
23 1/4 - 23 5/8
XL
61-62
7 5/8 - 7 3/4
24 - 24 3/8
2XL
63-64
7 7/8 - 8
24 3/4 - 25 1/4
3XL
65-66
8 1/8 - 8 1/4
25 5/8 - 26