I normally wear a size 10 or 11. I got these in a 10. These shoes are really tight in the toe area. I also bought a similar pair with a buckle, but in size 11, because I wasn't sure which I'd like better. I'm competing in a bikini competition and this type of shoe is required. In the ones with the buckle, my foot slides forward and there is an inch of shoe sticking out behind my heel which looks kinda stupid. I'm nervous to size up in these for more toe room because I don't want the same thing to happen. I read a review from another competitor who suggested heating up the plastic with a warm hair dryer then wearing them with socks to stretch them out. I think I will keep this pair and try that. The buckle pair is going back. Other than being tight in the toe, this shoe is comfortable and easy to walk in thanks to the platform under the ball.