24 in by 24 in (600 mm by 600 mm) Texas State Highway shield (toll), made to the specifications of the sign detail (sign M90-1). Uses the Roadgeek 2005 fonts. (United States law does not permit the copyrighting of typeface designs, and the fonts are meant to be copies of a U.S. Government-produced work anyway.) Colors are from [1] (Pantone Red 187 and Blue 294), converted to RGB by [2]. The outside border has a width of 1 (1/16 in) and a color of black so it shows up; in reality, signs have no outside border. The width of the upper right side of the flag is not specified; I chose 2 (1/8 in).
Own work based on Texas Manual on Uniform Traffic Control Devices
SPUI