I am usually a size 8 so I ordered the 8 first and then tried a 7.5 to compare. The 8 was a bit big and the 7.5 actually fit perfectly, BUT I kept the 8 because I could tell the 7.5 would rub the back of my heel too much. The 8 didn't do that. So it's good that it runs a bit big. I bought these for my wedding and I can't wait to wear them. They are BEAUTIFUL. They are relatively comfortable for a heel, especially with the cushioning, but I will still be getting pads for the balls of my feet since I'll be wearing them for hours. Also, if you wanted a different colored ribbon, you can easily switch it out as well.