Original WW 2 US Army Overseas bar.  
Gold wire machine embroidered thread on OD wool.  
These are Officer style but, can be worn by all ranks on wool uniform.  
Worn on left sleeve for service over seas during WW 2.  
Each bar represents 6 months service overseas.
Size is 1  x 1 1/8  inches.
 
This listing is for one, 2 bar patch, photo shows front and back.