Just not practical for me since I have wide feet i guess :/ they do feel a bit better with socks but I wanted to be able to wear them both ways. 5 and that is my true size but I dont think the design is all that great. And I returned it. A Logitech mouse wheel is smoother than this one. 5" and I wear a size 12us in every shoe imaginable but I sized up to the 13-14 inch (mens)slipper in these and I glad I did! Love this item. I may get a couple more to hang in the guest rooms for their towels or whatever. 12, 2019 UPDATE. Great sound quality and the battery last 100hours. At the same time, they dont overheat my feet, I guess because of the little holes on the top that allow moisture to escape.