I wear a 6.5M closed shoe so always size down to a 6M in a sandal. Have other Vionic shoes/sandals but these just don't have the fit. The strap material is shiny and stiff and the toe bed area is so wide that I couldn't tighten the straps enough to get a secure fit. I do have a pulled ligament in my left ankle so not entirely style fault. Sticking with Vionic's cork beds in sandals for a more secure foot bed fit with a deeper heel cup. I gave them two stars for the style and decorative front feature. Sorry to return.