Here is a super stylish long sleeve button down shirt from the 1970s by JC Penney. Most likely a poly or poly blend. Nice plaid of subtle blues and tans. Seven button front, buttoned pocket on each breast, and two buttons on each cuff. It's light weight, slightly sheer, soft, and super comfy. It's in amazing condition with years of life left! The tag says Large (16- 16 1/2), but here are the measurements taken laying flat (please refer to last photo to see how I measure men's shirts)

Shoulder to end of sleeve (including cuff) 22"

Chest (armpit to armpit) 24"

Length 31"

This item is sold from a vintage boutique in Roanoke, VA.