Here's a wool (or wool blend) long underwear shirt from the 1940s. These are US military issue. The top is a long sleeve pullover & is perfectly flambeed.

Designer: US military 

Condition: Pre-owned in fair/good condition. The top is flea-bitten with several holes around the underarm. Fraying around the collar & cuffs. Some discoloration on the top 

Size:  large

Measurements: (inches) 

taken flat and doubled when appropriate. Please compare with a similar fitting garment.

Shoulder to shoulder: 21 

Underarm to underarm across front: 21 

Armhole: 9 

Cuffs: 3.5 

Hem flat across the front: 20