ChampionMen's Double Dry 6-Pair Pack Cotton-Rich Low Cut Socks

It says 6 pack, does that mean 6 pairs or 6 socks...?

For anyone who may have ordered these in extra large, would they fit someone who wears a size 14 shoe?

Are these socks stretchy?

The size in the drop down is showing as "13-Oct." What does that mean?