Outdoor Research Size Guides
Ferossi Thru Gaiters Size Guide
| UNISEX | S | M | L | XL | XXL | S/M | L/XL |
| US Sizing | |||||||
| Men's Shoe Size | 4-7 | 6-9 | 8-11 | 10-13 | 12-15 | 5-8 | 9-12 |
| Women's Shoe Size | 5-7 | 7-9 | 8-11 | - | - | 5-8 | 9-11 |
| EURO Sizing | S | M | L | XL | XXL | S/M | L/XL |
| Men's Shoe Size | 35-40 | 38-42 | 41-45 | 43-47 | 46-50 | 37-41 | 42-46 |
| Women's Shoe Size | 35-37 | 37-41 | 39-44 | - | - | 35-39 | 41-45 |
Outdoor Research Hats Size Guide
| UNISEX | S | M | L | XL |
| US Hat Size | 6 3/4 - 7 | 7 1/8 - 7 1/4 | 7 3/8 - 7 1/4 | 7 5/8 - 7 7/8 |
| Circumference | 21.5 - 22" | 22.25 - 22.875" | 23 - 23.625" | 23.875 - 24" |
| UNISEX | 1 Size | S/M | L/XL | |
| US Hat Size | 6 3/4 - 7 5/8 | 6 3/4 - 7 1/4 | 7 3/8 - 7 5/8 | |
| Circumference | 21.5 - 24" | 21.5 - 22.875" | 23 - 24" |
