An Oklahoma State Highway 7 Spur shield, approximated from File:Oklahoma 7 Spur.jpg. No standard exists for this sign. 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.) 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.
Based on File:Oklahoma State Highway 7.svg
SPUI, Scott Nazelrod