I bought these slippers based on the fact that they had 3 different velcro "adjustments"(as my feet are long and narrow, and hard to fit) and customer reviews, which were generally favorable.  I bought the XL size(men's 11-12), which is the largest they make, despite my feet being a size 12.  I thought that, because of the adjustments, they might fit.  Well, they did not.  They were not only too short(my big toes were wedged in), but they had this seam that ran around the top of the slipper, that gouged the top of my foot.  Even if my feet had been a 1/2" shorter, the "ridge" on the top of the slipper would've made them very uncomfortable.  I still like the idea of the adjustments, particularly the one at the heel, but this particular iteration won't work.  I returned them.