| Size | US Men's Shoe | US Women's Shoe | EU Shoe Size |
| Small | 5.5 - 7.5 | 7.5 - 9.5 | 38 - 40.5 |
| Medium | 8 - 9.5 | 10 - 11.5 | 41 - 42.5 |
| Large | 10 - 12 | 12 -14 | 43 -45.5 |
| X-Large | 12.5 - 14.5 | - | 46 - 49.5 |
Sock Height
Sock Cushion
No Cushion Socks: A thin knit with no lift from terry loops in the socks. Regardless of yarn weight, this is a thin sock.
Cushion Socks: Terry loops underfoot and other areas of the sock, but does not wrap the foot. Our most popular, versatile cushion style.
Full Cushion Socks: The terry loops run the entire length of the sock, or at least up to the cuff, for a full wrap of cushion around the foot and leg.
Sock Weight
Ultra-lightweight Socks: The absolute lowest profile that is nearly a second skin. Even with cushion, these socks are sleek and silky smooth.
Lightweight Socks: The most versatile weight found in practically every sock category. When accompanied with cushion, it is considered the most sublime combination.
Midweight Socks: With the outdoors in mind, this is where Darn Tough's hiking socks and ski socks made their name. More natural insulation, and so durable they are a thru-hiker staple.
Heavyweight Socks: Our warmest socks. Always with cushion, if not a full cushion of terry loops, these usually have the highest Merino Wool content of any style with maximum Merino benefits.
