Cabela's thin wool socks.
My current Danners are a little tight at the ankle. Thick socks cut off my circulation even without lacing the boots even slightly tight. Bigger boots have my feet sliding around getting blisters. (That's not a Danner bash, other boots fit ME even less well.)
Cotton tube socks fit best early in the day but they get damp and ball up. Wool socks of a similar thickness work best for me.
Generally when it is truly cold I switch over to heavy wool socks inside low tops with gaiters to keep the snow out.
Tom