This user guide explains how to use the Forest Service Sign Sizing program. The program calculates the length and height of a rectangular sign panel for road and trail guide signs. Variable text messages and directional arrows can be mocked up using U.S. Federal Highway Administration standards. Users can make text or other changes and quickly determine the effect on sign size and appearance. After the sign is finalized, it can be printed and used for sign ordering. The sign text, size calculations, and other related information input into the database are saved for future reference.