A little stretched out around the neck and some hanger marks. It may help to spritz with water. Unfortunately care / size tag is pretty faded. I believe the original size was XL however judging by the way it fits I would say it's closer to a modern large. Meant to have a bit of a boxy loose fit. If it is desired to be a little tighter than it would most likely fit an XL okay.

Measurements across chest from pit to pit is 23 in, length from top to bottom hem is also 23 in.