Well used vintage  Boy Scouts of America Shirt, with gusseted hem, dating it to the 1940s. Might have been a leaders shirt.

Marked Size: none

Chest: 40”

 Shoulder: 15.5”
 
Sleeve from shoulder: 23”
 
Sleeve from underarm: 20.5”
 
Length (shoulder to hem): 27”
 

CONDITION: Good, a couple small holes and threads where there once was patches