...
Anyway, I decide to keep it and put it through the wash before wearing it. I have never seen a tee shirt shrink so much in all my 61 years. This thing went from a size XL to a size small in one wash. ...
My wife studied to a textile machine engineer, and she explained, this material (however is not wowen, but mechanically knitted) has some direction, what should be keep in mind, during cutting the shape. When it is turned by 90° the T-shirt will be shorter and shorter. (And wider and wider, how I hate it...)
I can advise you only that to take it out when wet, and pull, as strongly as you can. Then let it dry itself and iron it (or not).