My foot is 27.9 cm long and 10.1 cm wide. I wear 11 wide on most brands of shoes. I bought them 11 wide and they are at least 1/2 size too long. I also tried the 10.5 Wide FJ Hyperflex and believe it or not they fit a lot better than these FJ Traditions (size 11 Wide). I can't seem to get a constant size from FJ. Aggravating.