Description
On a six pointed white star 2 1/2 inches (6.35 cm) in diameter with a red border 3/32 inch (.24 cm) wide and 3/32 inch (.24 cm) in from the edge, a red letter “A” 7/8 inch (2.22 cm) high, all on a 2 3/4 inch (6.99 cm) Army Green disc.

Symbolism
The six pointed star is significant of the number “six” and the red letter “A” signifies “Army.” The red and white colors are the colors of the design approved for distinguishing flags for the numbered Armies.

Background
The shoulder sleeve insignia was originally approved for the Sixth Army on 26 January 1927. The original design was cancelled and a new design approved on 10 January 1945. It was amended to change the background color from olive drab to Army Green on 6 December 1960. (TIOH Drawing Number A-1-6)