Based on reviews, I ordered a full size larger but felt they were a bit too big. They were slipping off at my heels. Because the sole is stiff, I found that the half size larger gave me a glove like fit and that works rather well. I wear them without socks and haven't had any odor issues. (I don't typically have foot odor - but I have had a dreadful pair of shoes that didn't breathe (and created odor issues) in the past and these definitely do breathe.) If you plan to wear them with socks, you may prefer a full size larger. Generally speaking, I prefer comfortable shoes. Im still breaking these in, but they were pretty comfortable by the 2nd time I wore them. Bending the sole of the shoe inward with your hands a few times really helps add some flex to the sole which makes them much nicer to walk in... I love the looks of these. For around $50 for a nice pair of white sneakers, I think they are a good buy! (Now to keep the canvas clean!)