These mules are fabulous. They feel as if they were custom fit to my feet. I wear a sz8 - sz8.5, depending on shoe style & brand. I bought these mules in a sz8.5, (color medium brown). I'm guessing they must run a bit small since a sz8 would most likely be too small for me. I would suggest getting a half size larger than your regular size. The insole, although not spongy like memory foam, is quite comfortable. I would highly recommend these shoes.