This is a rough and tough sturdy camoflage jacket. It's great for keeping out the rain and wind with a high neckline and hood and in a durable proofed fabric. In good vintage condition, it should fit a chest size 38-42" or so (96 to 107cm) with the following actual garment measurments:
Chest: 48" (132cm)
Under arm seam: 26" (66cm)
Centre back: 33" (83cm)