I ordered my normal size of 7M. Fortunately our punt paid off and they fitted the same as the old ones. I went with the 8 and feel that the little bit of wiggle room will do me well after walking around in them a few hours. however, they do seem to run a little on the small side. Well these flip-flops have just arrived and 1st impressions are Im Well ?? pleased . ALL the other boots are not meant to be worn in water deeper than @12". Theres 5 different sizes of silicone ear buds and two sizes of memory foam ones. The biggest offender. The battery life is extremely good and they charge quick and are good for the whole day. So I constantly have to fix them to point them back into my ears to be able to hear because as they move the sound gets even more muffled.