This is my second pair. The first one I ordered some 3 years ago were 11.5 - 12 size. I found them a little long, but overall were comfortable. This new pair, which I ordered one size down, 11 - 11.5 were a little small, especially the left slipper. I am now returning them, because of this and reordering the larger size, although a little longer, but much more comfortable. Too bad I must pay for the return shipping. My true shoe size is 11 - 11.5.