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'

2500'