They run just a tad bit big on his feet but a half-size smaller and they would likely be too small. They are flexible and durable. He has not worn flipflops/sandals in several years so I was not sure if he would wear these and now they are his go-to weekend shoes for running errands. He can wear them all day he says. I think they look really good on his feet, too. Not too clunky and not too wimpy - just right. I would buy these again.