These are comfortable slippers with the memory foam, but they definitely run small. I wear a 6-1/2, sometimes size 7(US). I ordered 7-8 size. The length was fine, but the toe box through to the arch is pretty tight. That said, I figured within a day or so of wearing them, the memory foam would condense enough from wear to allow for more overall room within the slipper... it did and now they're comfortable. However, if you wear an orthotic or other insole, you need even bigger - as in my size, would would order size 8-9 women's. Other than that, the slippers seem to be made well and they are good looking too. Nice rubber sole with tread.