Ok, so I normally wear a 7 or a 7.5 - I ordered an 8 based on reviews. I figured I'd start there and return till I found the right fit. Well, the 8 works, but they needed to be broken in. So I wore them around the house last night and this morning with really thick socks, and that's all it took! Now I have on thin no show socks and I feel no discomfort. They're more gray than what the picture shows, which I love! These are my new favorites!