Size Chart - Orion®
| Size | Men's Shoe Size | Women's Shoe Size |
| Small | 4 - 5½ | 6 - 7½ |
| Medium | 6 - 7½ | 8 - 9½ |
| Large | 8 - 9½ | 10 - 11½ |
| X Large | 10 - 12 | 12 - 14 |
| 2X Large | 13 - 15 | -- |
| Size | Men's Shoe Size | Women's Shoe Size |
| Small | 4 - 5½ | 6 - 7½ |
| Medium | 6 - 7½ | 8 - 9½ |
| Large | 8 - 9½ | 10 - 11½ |
| X Large | 10 - 12 | 12 - 14 |
| 2X Large | 13 - 15 | -- |