I love these so much I bought two pairs, one black and one red.I bought two each of 39, 40 and 41. Dansk I wear a 39. Naot I wear a 41. Troentorp a 40, which is my most correct European size, usually. In US sizing I am between a 9 to 9.5 and I have a narrow to average width foot.I recommend just getting three sizes if you've never worn this brand.When picking the correct size, it's most important that your foot sits on the wooden footbed correctly and that your toes don't touch the ends. Someone else said that you can get the leather stretched if there's a problem area. Don't go up a size to fit the leather because the clogs will slip around and off of your feet, you won't be able to walk.So, tricky to fit, so order a few sizes but SO worth it!From San Diego, we will forever wear Troentorp clogs. We do recommend these clogs! We bought from several vendors. The returns were a breeze. I've been wearing these for days with and without socks. I purchased the O'keef clogs. They actually look way better, more feminine in person. They are so well made, the craftsmanship really shows and the lines are beautiful.Will be wearing Troentorp for a long time.