Vintage USA 1940s/50 Shirt
By Eezy Fit Uniform & Overalls Suppliers.
Fashioned in cotton in a relaxed fit with button front, turn up cuffs, chest pocket, slight tapering to waist, gathers to shoulders and upper back.
An attractive label on this, found near the hem.  label. 
This shirt is in very good condition, except for a chip to top pearlised button. 
Measurements
 
I estimate that this shirt would best fit a modern Size L, in a relaxed style but please check measurements given:
P- p 23”
Shoulder to shoulder 16.5”
Length 26”
Waist (measured flat) 19.5”