Vector Dull Black Blue helmet
Measure the circumference of your head just above your ears and eyebrows. Use the chart below to find your size.
| Size |
Head Circumference (cm) |
Head Circumference (inches) |
Fit |
| XS |
51–52 |
20–20.5 |
Extra Small |
| S |
53–54 |
21–21.5 |
Small |
| M |
55–56 |
21.5–22 |
Medium |
| L |
57–58 |
22.5–23 |
Large |
| XL |
59–60 |
23–23.5 |
Extra Large |
| XXL |
61–62 |
24–24.5 |
Double XL |
When between sizes, we recommend choosing the larger size for comfort.
