I got these for my son, because every time he comes to visit, he forgets to bring slippers with him, and because he will be visiting again shortly, I thought to get these slippers for him, and leave them here, when he leaves, so he will never be without. My son waers size 10, I ordered the Large which on the box says they should fit a 9.5-10.5, I tried them on knowing that if they fit me, they will fit my son also, I wear size 11 wide width in shoes, and they fit perfect, in lenghth and width, so soft and comfy, I'm thinking about ordering a pair for myself. A good buy at an affordable price. I wish they would add more colors to chose from.