I normally wear and 8/8.5 but post pregnancy feet happened so I originally bought an 8.5 and exchanged for a 9 but there really isn't that much of a difference. I have only worn them a few times but that is because they are very uncomfortable. They pinch my big toe to the point I feel like I am going to get an ingrown toenail and the back of the shoe which is elasticized cuts my heel at a very weird place - it seems extremely low on the heel and they dig in. I am hoping they will break in but there is not any support either and the material on these (leopard print) do not seem to have any give...we shall see because they are cute but that is where it ends...