These are the strangest sneakers/trainers I have ever seen.  There is the "MISS SIXTY" logo on the back, but other than that, the only label is inside the tongue of the shoe and reads "39".  I am assuming this is the European Shoe Size.  These may be shoes from a sample sale or something as there is no other labels that are typical inside the shoes. These have never been worn - no wear on bottoms.  See photos.

***US Women's Shoe size is approximate***