Maximum Readable Distance

Distance for best impact

Letter Height
(Inches)

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"