New Without Tags Brooks Brothers Navy Blue & White Gingham Check Supima Cotton Oxford Cloth Button Down Original Polo Shirt. Unlined collar, mother of pearl buttons.  14.5-31, and 20 inches across chest at armpit level.   Use measurements to predict fit.  Retail $140. 

Supima is a premium long-staple cotton which is only grown in the US.

Two small holes pictured.  Easy fix.

I combine shipping.