I originally bought these in a 7 (I normally wear anywhere from a 7 - 8 depending on the shoe, though mostly 7 1/2s). I had to return the 7s because they were too narrow. I then got them in an 8 and they fit, but I still cannot just slide my foot in - I have to pull on the straps to get my foot all the way in. This is not so much because they are narrow, but more from the material they are made from. The part your foot rests on is soooo comfy - it's squishy and cushions my foot so well. I am a teacher so I am on my feet a lot!