The label has been cut off.

I'm guesstimating it's XL

Measurements:

Shoulder to shoulder 24inch

Pit to pit 24 inch

Collar to butt hem 28 inch

Just ask if you need another measurement.

It's got a small snag backside of shirt. See photos I'm pointing at it. You can't hardly see it because it is camouflaged with the camo.

Google says it's Redhead Brand