AND1Men's Socks - Athletic Cushion Crew Socks (24 Pack)

Does this pack come with 24 PAIRS, or are there 24 socks (12 pairs) in this pack?

It shows 4 EQUAL pairs of each color ( 6 white, 6 black, 6 navy, 6 gray), is this accurate?

How long is the length of the sock? Mid calf or knee length?