UnderworksMen's Performance Cotton Compression Muscle Shirt - for Workouts, Slimming, and as Undershirt

Hi, I have a 45" chest, and I want a medium compression, what size? when do this item will be available for Prime?

Hi, I bought this shirt and the neckline was flat, i wear it a couple times now the neckline is curled up and can be seen there my shirt, why is that?

will it shrink in the dryer just in case I receive wrong size?

What’s the model number?