It is a basic fact that the greater the distance the viewer is from the sign, the larger it needs to be. Don’t make the mistake of ordering the wrong size and try our useful formula! Start with a sign that measures 2 inches. For every 3 feet, you step away, increase the sign width by 1 inch.
Formula:
2 inches + (distance in feet / 3) = Sign size in inches
EG: If you want to hang a house number on your door, it needs to be seen from the street, 30 feet away. Starting with 2 inches, add 1 inch for every 3 feet. This gives us a calculation of 2+10 = 12 inches. So, your house number would need to be at least 12 inches wide.