Runs narrow... So if you have narrow feet, YEAH, finally a pair of flip-flops you can wear comfortably!!! I have narrow feet and I tried on a pair of these my daughter purchased. I couldn't believe it! They fit without that "falling off" feeling. I have had my reefs dreams flip-flops for 4 or 5 years and I am still wearing them and they haven't stretched out and I can still wear them to the pool. Yes, they should be replaced but just because at the age of them they look a bit worn, but really, this was a great purchase. Everywhere you go, shoes are made for those with WIDE feet. Well, speaking from a minority with just the opposite, THANK YOU REEF!!!