This is a vintage US Army field jacket dating from the 1950s. Made in OG-107 olive drab green wool/nylon blend. Buttons down the front and at the cuffs. Not lined. It is in excellent condition, and looks like it was never worn. 

Tag sized for men with 41 to 45 inch chest. Will fit like XL to XXL for women. 

Chest/Waist/Hips - 50 inches
Length - 27 inches
Sleeves - 24.5 inches
Shoulders - 20 inches