LOVE these!!! They're butt-kicking and lady-like at the same time. Sizing is true, and after one wearing they did give a little, so any concerns about snug fit around the toes needn't be. Unless you have extra wide feet, I would say do not order up in size. Going up in size would cause the flipping off the back when walking, as they are a little "weighty" in the heel. I wore mine for six hours and at about that time I was ready to call it quits, so that's not too bad. Got compliments all night!!
The stud detailing at the back of the shoe are actually extremely heavy in weight relative to their size. As a result, only buy these shoes if you are willing to "suffer" to look cool. You will feel as though you have weights attached to your feet. The new workout shoe, maybe?