Okay, it depends on the brand, model, type of shoe and how you like to wear them. Really, it's best to try them on somewhere. And...here comes the latin toe hang vs. court shoe/practice shoe discussion. For latin, you may have heard about the preference of some dancers to have their toes hang over the edge of the shoe a bit. This will affect what size and width you order. For latin sandals (and I prefer the toe hangage), I actually order a International x-wide shoe that is 4 sizes smaller than my american street shoe size (which is 1.5 or 2 sizes smaller than recommended on the websites). In Supadance latins I usually order about 3.5 sizes smaller than my american street shoe. Court or smooth shoes fit differently for me with a closed toe. For Supandance court or smooth shoes depending on the model I will order either 1.5 or 2.0 sizes down from my american street shoe. So you see, it's best to try the shoes on somewhere first. There are just too many variables with brands, styles, widths and the structures of our feet.