I purchased 4 pairs, different colors, in the same size and each fit differently. Two are loose but wearable, one fits snug and places my heel toward the inside edge, and one fits perfect.  When they fit correctly you will make them your go-to flip flops. So easy to put on and the wedge heel is cushioned and this helps with back and leg pain. Much better than flat flip flops. The straps that go between your 2 toes are comfortable as well.  These are really awesome just want to own many that all fit the same lol.