These socks were available for purchase exclusively to fan club members who purchased streaming tickets for Sakanaction's "Kaiju" tour at K-Arena. This is a new, unopened men's size pair. Thank you! Product Description: The black "SOCKS “Kaiju”" sold at SAKANAQUARIUM 2025 “Kaiju” is now available. The band name "Sakanaction" is designed on the top of the foot, and the tour logo, in both regular and reversed versions, is on the heels. Available in two sizes: women's and men's. Size: MENS Equivalent to 25-27cm ■Color Black ■Material Cotton, Acrylic, Others