 
For Gentex Helmets Measure your head circumference as shown and place that number in section requested when ordering your helmet. You can use metric or American standard.
Select your head circumference using the left side of the chart to the right and select your helmet sizing.
OR
You can also use your known hat size using the columns to the right of the chart
|
Head Size Inches |
Head Size CM |
|
Europe |
Canada/USA |
UK |
Helmet Size
|
| 20.4 |
52 |
or
| 52 |
6 1/2 |
6 3/8 |
XXS |
| 20.8 |
53 |
or
|
53 |
6 5/8 |
6 1/2 |
XS |
| 21.2 |
54 |
or
|
54 |
6 3/4 |
6 5/8 |
S |
| 21.6 |
55 |
or
|
55 |
6 7/8 |
6 3/4 |
M |
| 22.0 |
56.5 |
or
|
56 |
7 |
6 7/8 |
M |
|
22.8 |
57 |
or
|
57 |
7 1/8 |
7 |
L |
| 23.2 |
58 |
or
|
58 |
7 1/4 |
7 1/8 |
L |
| 23.4 |
59 |
or
|
59 |
7 3/8 |
7 1/4 |
XL |
| 23.6 |
60 |
or
|
60 |
7 1/2 |
7 3/8 |
XL |
| 24.0 |
61 |
or
|
61 |
7 5/8 |
7 1/2 |
XL |
| 24.8 |
62 |
or
|
62 |
7 3/4-7 7/8 |
7 5/8-7 7/8 |
XXL |
| 25.2 |
63 |
or
|
63 |
8 |
7 7/8 |
XXL |
 ______________________________________________________________________________________________________
Flight Suit Size Chart
  (Sizes are in USA INCH)
| Size |
Chest |
Leg Inseam |
Sleeve |
| 34L |
33-34 |
32 1/8 |
24 1/8 |
| 34R |
33-34 |
30 1/8 |
22 5/8 |
| 34S |
33-34 |
28 1/8 |
21 1/8 |
| 36L |
35-36 |
32 1/4 |
24 1/4 |
| 36R |
35-36 |
30 1/4 |
22 3/4 |
| 36S |
35-36 |
28 1/4 |
21 1/4 |
| 38L |
37-38 |
32 3/8 |
24 3/8 |
| 38R |
37-38 |
30 3/8 |
22 7/8 |
| 38S |
37-38 |
28 3/8 |
21 3/8 |
| 40L |
39-40 |
32 1/2 |
24 1/2 |
| 40R |
39-40 |
30 1/2 |
23 |
| 40S |
39-40 |
28 1/2 |
21 1/2 |
| 42L |
41-42 |
32 5/8 |
24 5/8 |
| 42R |
41-42 |
30 5/8 |
23 1/8 |
| 42S |
41-42 |
28 5/8 |
21 5/8 |
| 44L |
43-44 |
32 3/4 |
24 3/4 |
| 44R |
43-44 |
30 3/4 |
23 1/4 |
| 44S |
43-44 |
28 3/4 |
21 3/4 |
| 46L |
45-46 |
32 7/8 |
24 7/8 |
| 46R |
45-46 |
30 7/8 |
23 3/8 |
| 46S |
45-46 |
28 7/8 |
21 7/8 |
| 48L |
47-48 |
33 |
25 |
| 48R |
47-48 |
31 |
23 1/2 |
| 48S |
47-48 |
29 |
22 |
| 50L |
49-50 |
33 1/8 |
25 1/8 |
| 50R |
49-50 |
31 1/8 |
23 5/8 |
| 50S |
49-50 |
29 1/8 |
23 1/8 |
| 52L |
51-52 |
33 1/4 |
25 1/4 |
| 52R |
51-52 |
31 1/4 |
23 3/4 |
|
