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Visibility Chart

DETERMINING LETTER HEIGHT AND SIGN SIZE

The overall legibility of a sign is essentially determined by the height, color, and font characteristics of the letters making up its message component.

A Sign with 4 inch tall text is best read from around 40 feet away, but is still readable from as far as 150 feet.

Note: 15 percent increase in letter height required when all upper case letters (all caps) are used instead of more legible upper and lower case letters with initial caps.

Simplified Letter Visibility Chart

Readable Distance Max Impact Distance Letter Height
100 ft 30 ft 3 in
150 ft 40 ft 4 in
200 ft 60 ft 6 in
350 ft 80 ft 8 in
400 ft 90 ft 9 in
450 ft 100 ft 10 in
525 ft 120 ft 12 in
630 ft 150 ft 15 in
750 ft 180 ft 18 in
1,000 ft 240 ft 24 in
1250 ft 300 ft 30 in
1500 ft 360 ft 36 in
1750 ft 420 ft 42 in
2000 ft 480 ft 48 in
2250 ft 540 ft 54 in
2500 ft 600 ft 60 in