This sandal fits way too big.  I lost the packaging so I can't return.  But they feel very sloppy on my foot.  I am an 8 1/2 size so I went up a size to the 9. Wrong size!  I often wear 9s in other sandals and this 9 feels more like a 10 1/2.  Hate it and I feel sort of ripped off since the price was high.  It is my fault for tossing out the packaging.  I thought it would work, but after a day of wearing them, I realize it is way too loose and sloppy and probably because it is the wrong size, the ortho sole won't help me with the planter's fasciitis.  P.S. The Sessom&Co flip flop is much more comfortable and true to size and is only half the price.  I recommend that flip flop over this Vionic one!