The size is 10M but I couldn't even put my foot in the hole. The size was so small I asked my daughter - wife 9 - to try it on and it fit her very well although it was a bit long. I gave them to her as work shoes. The shoe itself doesn't match Merrell's quality or comfort but seems solid enough. I can't help but wonder how such a tight boot could have been seen by someone like M, and it looks like it's missing a 10 as well. Maybe, but that's a bad sign for quality control.