WW2 Lybro Workwear Buttons    
Measurements:  (taken with the item laid flat & measured across one side)

Shoulder Seam to Shoulder seam: 
Underarm to Underarm:
Neck to Hem:
Shoulder Seam to Cuff: 

Photographed on a UK 38" Chest Mannequin. 

 Please check this accurate sizing information against a similar item you already own and ask any size/fit related questions before purchasing