I desperately needed slippers and made a few forays out early in the winter to buy some. NOWHERE in the city of Atlanta could I find slippers that fit. I wear a 9.5 shoe and even some label 10-11 were MUCH too small. I was very afraid to purchase online, but I knew Isotoners full-solid bottom, ballerina flats were exactly what I like, so I ordered the only ones (only available in black) in x-large. They fit like a dream! I may order a couple of back-up pairs. I wish I hadn't bothered store shopping at all and had ordered these back in October! WARNING - these are snug on me, so if you TRULY wear a 10 or 11, they may be too small for you!