450 mm by 600 mm (18 in by 24 in) new-style U.S. Bicycle Route shield, based on the specifications of the 2004 edition of Standard Highway Signs (sign M1-9) and the photo on the last page of [1]. Uses the Roadgeek 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.)
Own work
Fredddie