I am an 8.5 in pretty much every shoe. I ordered these in a size 8.5 based on reading the reviews and size chart. They were too small. I sent them back and I am waiting on a size 9 to arrive. I cant say too much about the shoe since I wasn't able to wear them. They were very lightweight, cute, and easy to get on. I will update my review when I receive the size 9.

Update: I received the 9 today and while the bottom of the shoe fit, with my toes right up to the toe she, the material upper part that should be tight in a water shoe is way too loose. Im really bummed out and don't know if its just this particular pair (maybe I should order another pair to see?) or if its just the way this shoe fits. The 9 probably won't work for me either. Too bad.