escription
On a silhouetted right cylinder 3 inches (7.62cm) high and 2 inches (5.08cm) wide divided vertically blue and red within a 1/8 inch (.32cm) yellow border a yellow ray issuing 1/8 inch (.32cm) from the lower border and terminating in the upper corners, overall a black Morion with yellow delineation.

Symbolism
The shape of the insignia is the distinctive shape used for Brigades. Yellow is for Armor; blue and red refer to the Brigade's Infantry and Artillery components. The Morion is a type of head covering adapted from the Moors by Spain. It refers to the Spanish discoverers of Florida.

Background
The shoulder sleeve insignia was originally approved for the 53d Armored Brigade on 4 December 1964. It was redesignated for the 53rd Infantry Brigade on 25 July 1968. (TIOH Drawing Number A-1-327)