Letter Visibility Chart

G-FORCE Graphics

Letter Visibility Chart

Source: California Institute of Technology

Letter Height (Inches)

Distance For Best Impact

Maximum Readable Distance

3"

30'

100'

4"

40'

150'

6"

60'

200'

8"

80'

350'

9"

90'

400'

10"

100'

450'

12"

120'

525'

15"

150'

630'

18"

180'

750'

24"

240'

1000'

30"

300'

1250'

36"

360'

1500'

42"

420'

1750'

48"

480'

2000'

54"

540'

2250'

60"

600'

3500'

15783 Co. Rd. H * Bryan, Ohio * 43506

419-636-0838

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