After spending a ridiculous amount of time researching sheepskin slippers online, I ordered these slippers, already a fan of Smart Dog.  I am a size 8 and ordered the 7.5/8 size slipper.  They were very tight and very hot on my foot, and I didn't love the aesthetics of the seam down the top, so I wasn't interested in getting the larger size.  I returned them and instead ordered the Old Friend women's moccasins, and loved them right out of the box!