Description
On a blue disc 2 1/4 inches (5.72 cm) in diameter a white letter “A” with members 1/8 inch (.32 cm) wide within a red circle 2 inches (5.08 cm) in diameter and 3/16 inch (.48 cm) in width.

Background
The shoulder sleeve insignia was originally approved for Third Army on 20 December 1922. It was redesignated for Third United States Army on 10 November 1960. The insignia was redesignated for US Army Central on 29 August 2006. (TIOH Drawing Number A-1-3)