So, with that said, I could of sized up but, without socks they fit fine. I like to have enough space when wearing flip flops. I thought I was ordering the mesh version of this, instead, I got the leather version. Das ist etwas gewöhnungsbedürftig und für mich eben nur für kurzen Smalltalk vertretbar. They are are as bad as the free wired ones they give out at gyms when you forget yours. I have plantar fasciitis and my feet hurt in anything, even sneakers, but these must be made by angels, but I can wear them all day long and feel good. Basil Rathbone and Nigel Bruce are the best duo for the Sherlock Holmes stories for me. Love these having come from my great Audio Technica AT900 headphones. Although they are M size they are really for a narrow foot. I ended up returning these sandals because they were too short.