I wear a 6.5 and even wear a 6 sometimes. I have wide feet and based on previous sanita reviews I purchased a 37. I wore these to work ( I am a nurse) with thin socks....YIKES...I could not wait to get out of these shoes! So painful! They fit fine but once I started moving around they became so uncomfortable. I've tried to stretch them out with bare feet by wearing them for short periods of time but after 4 hours my feet killed! But they are beautiful shoes. The metallic color shows more in the sunlight than under the hospital lights at work. I wouldve returned them but had worn them already and I wasn't about to purchase 38's so I had to buy ($35) shoe stretchers to stretch them out. I don't think I would order these shoes online ever again.