This All-American red white and blue cotton western cowboy shirt by Roper from the 90s has a button front (not snaps), with a button-down collar, perfectly matched front chest pockets and peaked back yoke.
Also has an opening for a pen or pencil to slip in the (wearer's) left pocket.
This actually may be earlier: it has that air-brushed-look printing that was so popular in the late 1970s.
Labeled a size 16-34, this measures:
Across back yoke: 19 and 3/4"
Neck point to shoulder point: 7.75"; this seam has been dropped to the front which creates a narrow front yoke
Sleeve: 23" long
Center back of the neck to hem: 31" long
Made in the USA.
This is in excellent condition; it’s freshly laundered and ready to wear.