This is an Old Navy top.  Size Medium. Material is 55%Cotton/30% Polyester/15% Acrylic. Across chest, under arms, is 19" unstretched. Sleeves are 24.5" ending in a flare.  Shoulder seam to hem is 26.5" long.  Color is a light gray.  Material is soft and very stretchy. Good, worn condition.  Machine Wash-cold/Tumble dry.  
Comes from a smoke-free/pet-free home.