Cotton//nylon/polyurethane blend socks by Japanese brand F/Style. The sock is designed to sit snugly above the ankle for maximum comfort, thus avoiding the use of an elastic band which can dig in and irritate the skin. 

Size Small: 22 - 25cm (approximately US women's size 5.5 - 8.5)

Size Medium: 24 - 27cm (approximately US women’s size 8.5 - 10.5, men's size 7.5-9.5)

Made in Japan.