I am a size 8, I ordered the 8 and they fit perfectly.
They look really good and can be dressed up or down. I actually saw them on a young lawyer and snuck up behind her to read the Roc tag at the back of the boot. I had ordered them online within 15 minutes of seeing them and they arrived about 2 days later.
I am very happy with them! Great quality for the price.
The only thing I would say is that they do have slightly pointy toes, so some people may not be able to wear them to walk around all day until they are broken in.