I wear a 9 D in just about every shoe or boot I own with only a few exceptions. I ordered a 9 and these boots fit spot on. These are very nice boots. They are substantial. What I mean is they have some weight to them, but they are not bulky or cumbersome in any way. What that tells me is the boots are very well constructed as well as being aesthetically pleasing. I am very pleased with the fit, quality, and workmanship and I will purchase more Thursday Boots in the future. Very much recommend.