New Era 9Fifty Size Guide - Adult
| New Era 9Fifty Size | Small - Medium | Medium - Large |
| Circumference (CM/ IN) | 54.9 - 59.6 / 21.61 - 23.46 | 57.7 - 63.5 / 22.72 - 25 |
| New Era 9Fifty Size | Small - Medium | Medium - Large |
| Circumference (CM/ IN) | 54.9 - 59.6 / 21.61 - 23.46 | 57.7 - 63.5 / 22.72 - 25 |