Koi are a symbol of friendship and love in Japan because the Japanese word for these colorful fish sounds just like another word meaning affection. These cute koi socks are in a style called tabi that separates the big toe from the rest of the sock. They were originally made for wearing with traditional Japanese sandals, but we find that they also make great flip-flop socks. Fits U.S. women's shoe sizes 6 to 10.5 or men's shoe size 4.5 to 9. 50% cotton, 20% acrylic, 18% polyester, 10% nylon, 2% spandex. Made in Japan.