LETTER SIZE

Here is a good reference when trying to determine what size letters you should consider when designing a sign. The "Maximum Readable Distance" is the farthest distance a person could comprehend the sign, while the "Readable Distance for Maximum Impact" is the suggested distance when trying to get a person to view the sign in a hurry and to comprehend the message.

Note: Timing and viewing angle will have an impact of the Readable Distance of the sign and should be considered when designing the sign.

 

 

LETTER VISIBILITY CHART

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"

Prepared by the California Institute of Technology

(315) 451-5940 Phone (315) 451-6127 Fax

220 Commerce Blvd.

Liverpool, NY 13088