This is what's referred to as a poet shirt. Gathered yoke across the front and back shoulder blade area.100% light weight cotton, 7 button front with a 2" collar.
Sizes are Lg-Xl-XXl-XXXl, and are as follows:
Shoulder to shoulder Chest Length Sleeve
Large- 18" up to 54" 29" 33"
Xlarge- 18" 54 1/2" 29 1/2" 33 1/2"
XXlarge- 18 1/2" 58" 30" 35"
XXXlarge- 18 1/2" 60" 30" 36"
Machine wash cold, drip dry, iron.
Many uses for various period looks from the 18th-19th centuries.