I ordered my usual shoe size but the fit was small. It's important to me to support American-made goods so I wore them anyway, and perhaps that was my error, because after the first wearing a pinhole appeared on the inner ankle of the left sock. It developed into a small run. Also, after the first wearing the bottom of both socks had become "fuzzy". I had only worn then inside my shoes but it looked almost as though the fabric had been dragged across sandpaper. On the up side, the wool is of excellent quality and the colors are vibrant. After I washed them I darned the hole/run and passed them on to a family member with smaller feet. She's very happy with them, has worn them several times, says they are warm.