The maximum size flag on a flagpole varies depending on what material is used to construct the flagpole. Quinn Flags sells aluminum and fiberglass flagpoles.

Aluminum flagpoles:

Fiberglass flagpoles

Pole Height Above Ground (in ft)

Maximum Flag Size (in ft)

Pole Height Above Ground (in ft)

Maximum Flag Size (in ft)

15 (Colonial only)

2×3

20

3×5

20 (Colonial only)

3×5

25

4×6

25

4×6

30

5×8

30

5×8

35

6×10

35

5×8

40

8×12

39

6×10

50

10×15

50

8×12

60

12×18

60

10×15

70

15×25

70

12×18