I have a 10 1/2 shoe size which is always perfect for Addidas and Nike running shoes. I bought the siz 11 Sorel Slipper and they fit perfectly, so order up a half size and you will be happy.

My feet are toasty warm and these slippers are nicely made. I will post later in a few months if the liner fails as others have complained. If this happens I could get a local shoe repair shop to sew in a sheepskin liner...

Jan 31, 2012 about a month after purchase. The interior lining is starting to fall apart. I now drop the rating down to three stars. These are ok. Next time I would buy the genuine lambskin lined slipper at Land's End. A much better product for the money.