I'm a size 11 but these shoes run small. The first thing I did was try to put in a size 11 shim as other reviewers stated, "These shoes don't provide a good grip. My panty liners didn't fit, so I knew I was in trouble. I tried them on and they were small. The tag said 11 but they fit like a 10. Also you will need support pads for these shoes so be sure to purchase a pair when ordering. I ended up buying them for cruises on the ship. I do 2 cruises a year and this would be perfect for that. I wouldn't recommend them for everyday use though as they seem cheap so trust them to wear out quicker than your average pair of running shoes.