Description
An equilateral triangle, one point up, above a horizontal tab attached in base, the overall dimensions of triangle and tab 4 1/16 inches (10.32 cm) in height and 3 7/8 inches (9.84 cm) in width, the triangle divided into three sections, the upper section yellow, the dexter section blue and the sinister section red, overall a gun bendwise in front of a tank track and wheels all black surmounted by a red lightning flash bend sinisterwise. In the apex the Arabic numeral "49" in black, all within a 1/8 inch (.32 cm) green border. The attached tab of yellow background, edged with a 1/8 inch (.32 cm) green border, with the inscription "LONE STAR" in black letters 5/16 inch (.79 cm) in height, the two words separated by a yellow star outlined black.

Symbolism
Yellow, blue and red are the colors of the branches from which armored units were formed. The tank tread, gun and lightning flash are symbolic of mobility, power and speed. The division's designation is in Arabic numerals.

Background
The shoulder sleeve insignia was approved on 3 June 1948. It was amended to add a tab on 8 December 1965. The insignia was further amended to revise the design to make the insignia and tab in one piece on 1 November 1973. (TIOH Drawing Number A-1-356)