I love these. I will note that I set as "fits as expected." I wear an 8.5 and always buy the 8. I feel like the thong part stretches a bit over time so the 9 fits ok at the start but then feels big. Going down the 1/2 size fits perfect.

I cannot say enough good things about the arch support and cushion. These are so superior to the normal thin, support-less flip flop!  I have many Vionics - I consider them an investment in my feet comfort...which has big impact throughout the body!