Amazon's information on these socks is not correct. I keep wondering why they shrink so much, and just noticed that they have added rayon to the sock. Rayon is not even supposed to be washed and so the sock contains: 67% Cotton, 19% Nylon, 12% Rayon, 1% Spandex, and 1% Polyester.
I know that the extra shrinkage  is because of the rayon.
I will keep them because they do stretch back out, but just know that the rayon is not listed and is no help at all.