I normally wear a size 5.5 to a 6, but after reading the reviews and hearing that they ran large, I ordered a 6.5 and they are much to big. I'm not sure if it was because they were too big but they put a ton of pressure on the tops of my feet no matter how loosely I tied them. Going to return for a smaller size and hope that the fit is the cause because they are so stinking cute!