You're never too old for a wacky pair of critter slippers. P.S. slip-resistant outsoles make these perfect for snack runs to the kitchen; just saying.Unisex Adult Size Guide - XXS (Women's 5-6/Men's 3-4), XS (Women's 7-8/Men's 5-6), S (Women's 9-10/Men's 7-8), M (Women's 11-12/Men's 9-10), L (Women's 13-14/Men's 11-12), XL (Women's 15-16/Men's 13-14)