Full Service Size Chart
| Size | Head Size | US Hat Size | Metric Size |
| XS | 21" | 6 5/8" | 53 |
| S | 22" | 7 | 56 |
| M | 23" | 7 3/8" | 59 |
| L | 24" | 7 5/8" | 61 |
| XL | 25" | 8" | 64 |
| Size | Head Size | US Hat Size | Metric Size |
| XS | 21" | 6 5/8" | 53 |
| S | 22" | 7 | 56 |
| M | 23" | 7 3/8" | 59 |
| L | 24" | 7 5/8" | 61 |
| XL | 25" | 8" | 64 |