I have another pair of vionic shoes (some of their flip flops), and I love them, so I was extremely disappointed in these shoes.  I ordered a 9 (the size of my other pair), and they were so small, I couldn't even get them on.  I sent them back and ordered a 9.5, but that pair was also just way too small.  It's almost like they didn't account for the height of the orthotic when they designed the shoes.  I ended up sending the 9.5 back as well b/c there was just no way I could wear them all day.