Background Trimming (Oval) Description
An oval-shaped embroidered item 1 3/8 inches (3.49 cm) in height and 2 1/4 inches (5.72 cm) in width overall, divided diagonally from upper right to lower left, scarlet over white, with a 1/16 inch (.16 cm) yellow notch on each side at horizontal center line, with a 1/8 inch (.32 cm) yellow inner border and all within a 1/8 inch (.32 cm) black outer border.

History
The background trimming was authorized on 8 January 2008.

Source: The US Army Institute of Heraldry