The size of flag is dependant on the size of the flagpole. For porch mount flagpoles the 3 x 5 Ft flag is the most common. For in-ground flagpoles the general rule of thumb is that the height of the flag should be 1/5th the height of the flagpole. For example take a 25 ft high pole – 1/5th of the 25 ft leaves 5 ft. So that would carry a 5 x 8 ft flag.

Please be aware of the size of flag that is recommended for your flagpole. Flying a larger flag than is recommended by the manufacturer may result in damage to the flagpole.

Common size range chart
15’                   3’x5’
20’                   3’x5’-         4’x6’
25’                   4’x6’ –     5’x8’
30’                   5’x8’ –     6’x10’
35’                   6’x10’ – 8’x12’
40’                   6’x10’ – 10’x15’
45’                   8’x12’ – 10’x15’
50’                   10’x15’ -12’x18’
60’                   10’x15’-                               15’x25’
70’                   12’x18’ – 20’x 30’
80’                   15’x25’-                               20’x38’
90’                   15’x25’ -20’x38’
100’               15’x25’ -30’ X 60’