Allison Daley Women’s Red Blue Plaid Long Sleeve Button Down Shirt. 60% cotton 40% polyester. Size 12.

Sizing can vary, even within brands, so please compare measurements to a similar item that fits well.
Measurements when laying flat and unstretched:
22.5 " across chest (armpit to armpit)
26 " length (center back neckline to bottom hem)
17.5" sleeve length (underarm seam to cuff)