Dr. Scholl'smens Graduated Compression Over the Calf Socks - 2 & 3 Pair Packs - Comfort Fatigue Relief

What a “one US size” means? Does it mean that it will fit any shoe size between 7 and 14?

Are these socks easy to pull on and take off?

I am looking for a work sock not a dress sock. Are these somewhat thick like the old style tube socks that reach over the calf?

What colors come in "navy assorted?" Please answer if you know. Thanks!