Fits true to size and most comments say true to size. My husband wears a 10.5 so I chose 11 to be on the safe side but they are too small and his toes are stuck to the tips with no strap. I would happily replace/exchange for a larger size but the only option seems to be to return and buy again at full price. I didn't pay full price for them at all, nor did I have to pay to have them replaced with the correct size.