From Farfetch
white ribbed knit ankle-length Be sure before opening, as socks and hosiery can only be returned in their original, unopened packaging.
From Bloomingdale's
Birkenstock Logo Crew Socks.Color:White.Size:12-12.5US / 45EU.Material:73% cotton/25% polyamide/2% elastane.Socks.
Birkenstock Logo Crew Socks.Color:White.Size:9-9.5US / 42EU.Material:73% cotton/25% polyamide/2% elastane.Socks.