My ankles have pronated all of my life, so I was really looking forward to trying the Vionic line of footwear. However, after purchasing these sandals, I doubt that I will try Vionic again. They don't even make half sizes in a lot of their shoes, so I had to go down to a size 7, instead of 7.5, and thank goodness I did. These are HUGE. I am just grateful that I got a pair that is completely adjustable from toe to ankle, or I would have had to send them back, because they are ridiculously wide.<br /><br />I think the idea for Vionic shoes is valid, but I believe they should consult a reputable, experienced footwear manufacturer to ensure they have the sizing correct. The nicest thing I can say about these shoes is that they are very well made. They would probably last years, if I could wear them that long.