I already had a pair of these sandles from Zappo and I liked them so much I wanted another.  I find that I had to go up a half size for foot length.  While the first pair fit, my toes are right at the edge.  The 1/2 size up made a good difference.  Because they are velcro, you can adjust them to fit the width of your foot.
Really comfortable and my chiropractor also liked them.