ONE SIZE FITS MOST: Luxurious combed cotton will keep your feet toasty warm. Our unique blend of combed cotton, spandex, and elastic will allow our socks to comfortably fit most feet. US sizes 6 to 10 fit best, making these socks the perfect gift for nearly anyone. Try them for a fun Christmas present, hostess or housewarming gift, birthday present, fun party favor, Mother's day present, a clean secret Santa gift exchange idea, or keep them for yourself! Machine washable with like colors.