I bought these for my son for Christmas.  They arrived the day after.  He put them on as soon as he got in the house.  They're thick and squishable, very warm and he said they're not tight.  He wears size 14 and it's hard to buy socks that do all of the above.  Thanks SO much!
1/2/2013,Adding a bit: He worked outside the day after Christmas.  It was VERY cold.  He said they kept his feet warm for 2 hours, which is 2 hours more than he's used to.