Background Trimming (Oval) Description
A buff oval shaped embroidered item edged with a 1/8 inch (.32 cm) ultramarine blue border, 1 3/8 inches (3.49 cm) in height and 2 1/4 inches (5.72 cm) in width overall divided from upper left to lower right by three ultramarine blue bands (middle band is 1/8 inch (.32 cm) in width and left and right bands are 1/16 inch (.16 cm) in width).

History
The background trimming was approved on 26 January 2005.

Source: The US Army Institute of Heraldry