I wear a 9.5 and ordered a 10 in silver glitter and they fit perfectly, so definitely order a size up.  I wore these as a bridesmaid in a wedding and didn't break them in first.  I was in them for several hours before they started to rub my pinky toe.  They're a bit stiff and have fabric on the bottom where the ball of your foot is, so they're slippery because they have no tread.  The glitter comes off a little, but they held up great and were GORGEOUS for the wedding. I was glad I bought these and would buy them admonish ina heartbeat.