On a yellow shield 3 3/8 inches (8.57 cm) in height and 2 3/8 inches (6.03 cm) in width overall a white buffalo skull in front of a green diagonal band all within a 1/8 inch (.32 cm) white border.
Yellow is the color used for Cavalry and the green diagonal band represents the hills of Montana, the home state of the unit. The buffalo skull symbolizes Montana's Old West heritage.
The shoulder sleeve insignia was originally approved for the 163d Armored Cavalry Regiment on 18 April 1968. It was redesignated for the 163d Armored Brigade with symbolism revised on 1 February 1989. (TIOH Dwg. No. A-1-492)