This is listing is for a lot of four Pink Floyd Socks, two pairs of ankle and two pairs of crew socks. Note the first pair encompasses two inside of the packaging. 
The first pair pictured, the gray with a rainbow with white "Pink Floyd" lettering are the ankle socks. 
The white and black pairs are the crew socks. They fit shoe size US 7-12, UK 6.5-11 and EU 40-46.
They are all made of 96% polyester, 2% nylon and 2% elastane, and are official merchandise - 2025 Roger Waters Music Overseas Ltd.