Gold Toe mens Windsor Wool Over-the-calf Dress Socks, 3-pairs Windsor Wool Over-the-calf Dress Socks, 3-pairs (pack of 3)

Is this still a 3-pack? It doesn't say anywhere (I bought this item in late 2012, at $18 for 3-pairs. The order now brings me to this page.)

How big a calf will these stretch to fit comfortably?

Is this a three pack?

Are the windsor wool-blend over-the-calf designed for cold weather?