I bought this pair a few years ago and bought a size 5 as I usually wear this flat. INCORRECT! The shoes ruined my feet during my trip to Italy - walked a lot - and I had no choice but to throw them away during the trip. Today I decided to give these shoes a second chance and ordered 5.5 and they fit perfectly! You'll definitely want to go up a half size if you're not sure - they're worth trying again because I really like how they look with my outfits. Now I'm a happy tourist.