Visibility Chart
This letter visibility chart is based upon information provided by Pennsylvania Transportation Institute, Penn State University and the United States Sign Council (USSC).
Viewing Distance
100 ft.
250 ft.
360 ft. (city block)
500 ft.
750 ft.
1000 ft.
1320 ft. (1/4 mile)
Minimum Letter Height
4″
10″
16″
22″
33″
43″
57″
Calculations based on an externally (or naturally) lit sign with all upper case Helvetica letters utilizing optimal negative space. Factors that may affect required letter size are: color scheme, font selection, traffic and weather conditions, or sign standoff. Please refer to the complete study for additional information.