Beret Flash Description
A buff shield-shaped embroidered item with a semi-circular base edged with a 1/8 inch (.32 cm) ultramarine blue border, 2 1/4 inches (5.72 cm) in height and 1 7/8 inches (4.76 cm) in width overall divided diagonally 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 beret flash was approved on 26 January 2005.

Source: The US Army Institute of Heraldry