I purchased these socks to use to wear around the house (I am not a fan of how slippers look on feet).  I have size 11 feet and these socks are a tiny bit large on my feet but that makes them perfect for wearing over anklets (two layers of socks are great for warmth when you have hardwood floors).  I have washed the socks a few times and they seem to keep their shape and elasticity.  Again, for $2 a pair if you get a season's wear out of a pack, they are a tremendous value (and they are good looking to boot!).  A great purchase.