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Letter Visibility
Proper letter size is critical in exterior sign applications. INNERFACE’s expert exterior sign planners make sure that you receive the maximum impact from all of your exterior signs. Please use the chart below as a reference guide for exterior applications. For more information, please contact your local representative to schedule a planner visit for existing sign review and new sign needs.
 
Maximum Readable Distance Readable Distance for Maximum Impact Letter Height
100 ' 30 ' 3 "
150 ' 40 ' 4 "
200 ' 60 ' 6 "
350 ' 80 ' 8 "
400 ' 90 ' 9 "
450 ' 100 ' 10 "
525 ' 120 ' 12 "
630 ' 150 ' 15 "
750 ' 180 ' 18 "
1000 ' 240 ' 24 "
1250 ' 300 ' 30 "
1500 ' 360 ' 36 "
1750 ' 420 ' 42 "
2000 ' 480 ' 48 "
2250 ' 540 ' 54 "
2500 ' 600 ' 60 "