Shark Helmet Sizing Guide: This is directly from the manufacturer:
| Shark Helmet Sizes: |
| Head Circumference: |
Inches: |
Metric Size: |
Letter: |
| 20 3/4" |
6 1/2 - 6 5/8" |
53-54 cm |
XS |
| 21 1/4 |
6 3/4 - 6 7/8" |
55-56 cm |
S |
| 22 3/8" |
7 - 7 1/8" |
57-58 cm |
M |
| 23 1/8" |
7 1/4 - 7 3/8" |
59-60 cm |
L |
| 23 5/8" |
7 1/2 - 7 5/8" |
61-62 cm |
XL |
| 24" |
7 3/4 - 7 7/8" |
63-64 cm |
XXL |
| 24 3/8" |
8 - 8 1/8" |
65-66 cm |
XXXL |
|
|
