Vintage cotton sateen Army shirt.  Can be worn as a shirt or is a good weight for an overshirt.  Decorated with Jolly Knot's personal colection of vintage patches from WW2 through Vietnam. 
 
Size:
21.5 from pit to pit
28.5 center back collar to hem
32.5 center back collar to end of sleeve cuff
 
Fit is a small Mens size or medium Womans size