I’m size US 7 and ordered M, fits perfectly. I bought both the lavender and the pink. They’re pretty heavy but it helps me keep my balance. LOL I was intimidated by the height of these in person but if you’re used to wearing heels you’re good. I was worried that all the glitter would fall off easily and get everywhere, but surprisingly it’s pretty stuck on there. I’m satisfied with the quality, I highly recommend getting these. Also, if you want a subtle color get the lavender. It’s very light and true pastel. The pink is pretty vibrant.