YawYewsMen’s Fashion Athletic T-Shirts Short Sleeve Casual Tee Plain Loose Workout Gym Streetwear Shirts

I'm 5'6 and weigh 180 would a medium be a good fit?

I'm 5'9 179lbs what size should i get?

The workout shirt runs a little bigger or smaller

Are these shirts only meant to be worn when working out?? Can they be worn as regular shirts and does the neck stretch enough to get over your head?