The BD Medium Crew Merino Sock provides extra instep cushioning and merino wool thermoregulation.
From clean climbing, to conservation, Black Diamond is committed to protecting the people and places we love.
Learn More
We trust what we make because we use what we make. All Black Diamond soft goods are warrantied against defects in materials and construction for the practical lifetime of the product.
Overall rating: 4.7272725 / 5 from 11 reviews.
Review topics: [].
"I wear these under the mid-height hikers I wear on a daily basis. They offer sufficient padding and keep my sweaty feet dry, whether I am on campus to work or in the countryside to walk. I am not sure that I would wear them in my traditional mountaineering boots, which work better with a thick wool sock. The socks are well made, and I expect that they will last a long time."
"Bought a couple pairs of these for a hiking sock but I bought a few more because I want to wear them all the time. Super breathable and they don’t get floppy or lose their shape over the day, whether hiking or just around town."
"Keeps feet toast. Don’t wear out. Good for hiking and skiing!"
"awesome socks"
"Comfortable but doesnt feel that strong neither, we'll see"
"These socks are perfect, not too thick but plenty of cushion! Superior quality, as always from Back Diamond"
"these socks are great"
"Keep my feet cozy and warm"
"These are fantastic and have a healthy amount of wool % in them, vs some other brands. You know who."
"Good, high-quality socks. Better than expected."
| Size | US Men | US Women | EU Sizing | CM |
|---|---|---|---|---|
| S | n/a | 4 - 6.5 | 34 - 37 | 21.0 - 23.5 cm |
| M | 6 - 8.5 | 7 - 9.5 | 38 - 41 | 24 - 26.5 cm |
| L | 9 - 11.5 | 10 - 12.5 | 42 - 45 | 27 - 29.5 cm |
Use your typical US street shoe size to find the right sock size.
| Size | US Men | US Women | EU Sizing | CM |
|---|---|---|---|---|
| S | n/a | 4 - 6.5 | 34 - 37 | 21.0 - 23.5 cm |
| M | 6 - 8.5 | 7 - 9.5 | 38 - 41 | 24 - 26.5 cm |
| L | 9 - 11.5 | 10 - 12.5 | 42 - 45 | 27 - 29.5 cm |
Crew socks typically reach mid-calf and are ideal for activities that require extra warmth or added coverage on your legs.
| Size | Calf Circumference | US Men | US Women | EU Sizing |
|---|---|---|---|---|
| S | 9.5–12 in 25–31 cm | 3 – 7.5 | 4 – 9 | 34 – 40 |
| M | 12.5–15 in 32–38 cm | 5 – 10 | 6.5 – 12 | 37 – 43 |
| L | 15.5–17.5 in 39–44 cm | 7.5 – 13 | 9 – 15 | 40 – 46 |
| XL | 18–20 in 45–50 cm | 10+ | 12+ | 43+ |
Measure your calf circumference at the widest part
