Vintage US Army Vietnam War Era 1970 Olive Green OG107 Cotton sateen shirt

Vintage chest and collar patches
Button fastening 
Chest pockets
Button cuffs

Size label faded, doe read 16.5 x 3? it is best to compare the measurements against clothing you have to ensure a good fit.

Collar length 16.5"
Armpit to armpit 24"
Sleeve from armpit 20"
Length from shoulder to hem 28.5"