I got the 37 (about a 6.5) in the black, which is what I normally wear in a boot since I wanted to wear thicker socks and I have a higher arch (I generally wear a US 6 in street shoes). These accommodate my high arch and even allow me to put my insoles in for a more comfortable fit. The insoles are removable and the boot has been water resistant as advertised (I even ran around in six inches of sloppy snow last weekend and they didn't leak). I wish these were a finer grain leather instead of the stiff nubuck leather, but they have proven to be rugged so far and aren't getting marked up after three months of use. They are too wide in my heels but that is a common problem for me. I also wish I could tighten them a bit more around the ankle. Since I wear thick socks with them, they also don't rub on my ankle as others have mentioned, but I could see how that might be a problem. However, they are comfortable enough to put on a couple miles walking in the city and they haven't given me blisters.