First time, I ordered 9-10's, but when they arrived they were 9.5-10.5's and way too big. So I returned them and ordered 8-9's. I take a size 9 shoe most of the time (depends on the shoe, as they all fit differently). When they arrived, they were indeed 8-9's. Yippee! And they feel nice and soft with thick foam inner soles and tough outer soles, which I like for wearing outside. But they're wide enough to fit an elephant, so don't really cling to my foot the way I'd prefer. For seniors like me, that could potentially be dangerous! From what I've read, most in-house falls to seniors are caused by slippers and I can see that easily happening with these. But for ten bucks I'll keep them and hope I don't kill myself.and continue my never-ending search for the perfect slippers for under $30. Hope I live long enough to find them.