My foot measures at 9.3, which is a 7US on all measurement charts. I typically wear a size 7US in gym shoes, but go up to a size 7.5US or 8US in dress shoes and heels for more space since they fit differently. I decided to order even further up to a size 8.5US based on the shape of the shoe and other reviews. Unfortunately, putting on this size 8.5US shoe was like squeezing my foot into a size 6US. Remember when Cinderellas step-sister tried squeezing into the glass slipper, and she got it on, but her arch curled up? Yeah, it was like that, only less dramatic.  Its a cute enough shoe, but not really worth trying to find a size that fits.