Background Trimming (Oval) Description
A silver gray oval-shaped embroidered item 1 3/8 inches (3.49 cm) in height by 2 1/4 inches (5.72 cm) in width overall surmounted by a scarlet inner oval approximately 1 1/2 inches (3.81 cm) in width and 3/4 inch (1.91 cm) in height overall within a 1/8 inch (.32 cm) silver gray edging.

History
All the background trimmings were approved on 20 June 1994.

Source: The US Army Institute of Heraldry