These shoes fit true to size.  I am a 10.5 so I had to order a 10 and they are a bit short on my feet but not so bad that i cannot wear them to workout.  I bought them to do T25 workouts which have a lot of jumping and are hard on the feet.  It has more support than other shoes I have tried but I still had some pain in my arches.  Compared to my other shoes... these are better but not the best.  I must add that they are super cute!  Even my husband commented on liking them.