Vintage Western green shadow check plaid long sleeve shirt sz M

In good condition
Vintage Western/Cowboy long sleeve shirt in green check - approx 70s
Poly cotton mix fabric
No brand label - small label reads ‘permanent press’ and size S. it came from America and the measurements are more a U.K. M
Features all the Western styling including pointed yokes, pearl snap fasteners, deep cuffs, pocket flaps and curved hem
Shirt measures
Armpit to armpit 21 inches - total 42 inches
Side seams curve in a bit - at narrowest part it measures 19 inches - total 38 inches
Armpit to hem 16 inches
Armpit to end of sleeve 20 inches
Shoulder to shoulder across the back 17.5 inches