I originally ordered these in a 10 womens, which is listed as a 42 EU size. I normally wear a size 10, but a 41 in EU (such as with Danskos). I ordered the 10 and they were way too big. I exchanged for the 9 and they fit perfectly. I have wide feet that swell a good amount by the end of the day, and the 9 is still perfect.