Determining Flag Size
The length of the flag should be at least ¼ the height of the pole. For example, a 40’ pole requires a 6’ x 10’ flag or larger. This guideline applies to poles 20’ and larger. Most residential flags are 3’ x 5’, or 4’ x 6’. Most small industrial and commercial buildings use either a 5’ x 8’ or 6’ x 10’ flag. Major industrial, municipal and government buildings require 8’ x 12’ and larger. However, the size of the pole is the determining factor.
Flagpole     Flag
20’             3’ x 5’, 4’ x 6’
25’             4’ x 6’, 5’ x 8’
30’ – 35’    5’ x 8’, 6’ x 10’
40’ – 45’    6’ x 10’, 8’ x 12’
50’             8’ x 12’, 10’ x 15’
60’ – 65’    10’ x 15’, 10’ x 19’
70’ – 80’    10’ x 19’, 12’ x 18’
90’ – 100’  20’ x 38’, 30’ x 50’
Flag length should be at least ¼ the height of the pole.
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