I ordered my true size (7.5-8) and ordered a size bigger since the reviews were saying it runs big. I returned the bigger ones as I felt they were true. I wanted a sure I could wear working on my feet all day. I'm not thrilled about the arch support (I naturally over-pronate) however I feel they do a pretty good job at keeping my feet and back from hurting at the end of the day. Pretty cute and easily go with most outfits. Slightly librarian-like with a skirt though.