mens N6210 T-Shirt (pack of 1)

I'm 6'1 and 160 pounds and i looking for a snug (not to baggy not to tight) fit should I get medium or large?

Does it have a pocket?

For those who got shirts that fit well and have lasted, which seller did you purchase from? Thx!

To clarify— description states “Pack of 6”; will I actually receive 6 shirts for the listed price?