A white star 1 inch (2.54 cm) in diameter with a red disc in the center and with golden orange wings below the Arabic number 13 in white 1 3/32 inches (2.78 cm) in height on a blue disc 2 1/2 inches (6.35 cm) in diameter with a 1/8 inch (.32 cm) golden orange border.
The colors are those of the Army Air Forces. The winged star is symbolic of the Army Air Forces while the number 13 is the numerical designation of the organization.
The shoulder sleeve insignia was approved on 18 January 1944.