New Without Tags Brooks Brothers Blue Supima Cotton Oxford Cloth Button Down Shirt. Made in USA.  Size 15.5-35 Regent, which is Slim Fit.  Measures approximately 22 inches across chest at armpit level.  Retail $140. 

This is a recent model, featuring an unlined collar, no chest pocket, mother of pearl buttons, and side seam gussets.  Supima is a long staple cotton grown only in the US.

Small flaw in fabric by collar, pictured.

I combine shipping.