Black and yellow patterned "Koi" (carp) socks. It looks like two fishes when you're wearing the pair of these socks.
The split-toe socks are originated by the traditional Japanese socks. The socks can stretch a lot so that both men and women can wear them. The size references, EU 36.5 - 42, US 5.5 - 9.
Product
BrandKYO-TO-TO
Size 22.5cm~27cm EU:35~42 US:5.5~9
Material 63% Cotton, 27% Acryl, 8% Polyester, 2% Polyurethane