I LOVE these! Light weight and so comfortable. I have a thin to medium wide foot and they fit me a little loose, but doable. My foot is 10 long and 3 3/4 wide at the widest part of my foot. I did order the size 9 which is normally what I wear. After reading the reviews I feared they were not going to fit because people were saying unless you have a super thin foot, these will be too tight. In my review Im putting information that I wish I could see in a review, especially for shoes! I took my chances because of the return guarantee and Im glad I did. I love them and I definitely recommend!