Description
On a blue square 2 1/2 inches (6.35 cm) on a side a sun in splendor in yellow, the disc 13/16 inch (2.06 cm) in diameter, 12 rays within a circle 1 7/8 inches (4.76 cm) in diameter. The square to be worn point up.

Symbolism
The design alludes to California where the division had its origin, while the blue field alludes to the sky and the Pacific Ocean.

Background
The shoulder sleeve insignia was originally approved for the 40th Division by telegram dated 23 November 1918. It was officially announced on 27 May 1922. The insignia was amended to include method of war on 17 March 1931. It was redesignated for the 40th Armored Division on 27 July 1954. It was reinstated and redesignated for the 40th Infantry Brigade on 1 May 1968. It was redesignated for the 40th Infantry Division on 21 January 1974. The insignia was amended to add the symbolism on 19 January 1999. (TIOH Dwg. No. A-1-495)