I normally wear a size 8. Soo, I ordered a size 8, but they are literally flopping off of my feet. I read other reviews that said the shoes will eventually mold into the frame of your foot, but that isn't what happened with mine.  I've been wearing mine for about 2 weeks now and I'm still waiting for them to mold :( They're constantly flopping, even if I wear socks. My advice, definitely order a size smaller then you normally wear and let them stretch to fit to your foot. Awesome shoe, super comfy, but just a tad on the big side.