I bought this for myself originally, but I didn't read all of the description and didn't realize pregnant women cannot use. So my partner used it on his large rough ass feet. He is a size 16 shoe so it took a bit of effort to fit his feet in. Good news is a pretty big foot can fit in there comfortably. Probably up to size 14. But after 3 days the dead skin was coming off. Be careful that dry, dead skin gets everywhere. The results were good and he was satisfied.