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509 Helmet Sizing
View all 509| Size | Head (cm) |
|---|---|
| XS | 53-54 |
| SM | 55-56 |
| MD | 57-58 |
| LG | 59-60 |
| XL | 61-62 |
| 2XL | 63-64 |
| 3XL | 64-65 |
| 4XL | 66-67 |
Sizing information is provided by the manufacturer and does not guarantee a perfect fit.
How to Measure
-
H
Head
Wrap a cloth measuring tape around your head just above your eyebrows and ears. Pull the tape comfortably snug, read the length, repeat for good measure and use the largest measurement.
509 Youth Helmet Sizing
View all 509| Size | Head (cm) |
|---|---|
| Youth SM | 47-48 |
| Youth MD | 49-50 |
| Youth LG | 51-52 |
Sizing information is provided by the manufacturer and does not guarantee a perfect fit.
How to Measure
-
H
Head
Wrap a cloth measuring tape around your head just above your eyebrows and ears. Pull the tape comfortably snug, read the length, repeat for good measure and use the largest measurement.
