Choosing the Right Size Flag for a Flagpole

The method for determining the correct flag size for a flagpole might not seem obvious, but there are some easy tips you can use to get it right. The first step is to consider is whether you’ll be installing a wall-mounted pole or an in-ground pole.

For in-ground poles, the fly, or length of the flag should be at least one-quarter the height of the pole. For example, the flag for a 20′ high flagpole should be at least 5′ in length. A 3’x5′ flag would be a great choice for a 20′ high pole. For both safety and aesthetic reasons, the length should be no larger than one-third of the flagpole height.

For residential or wall-mounted flagpoles, the process is slightly different. For homes, most experts suggest using a 2 1/2′ x 4′ flag for a 5′ pole and a 3′ x 5′ flag for poles higher than 5 feet.

Recommended Flag Size

Recommended flag size for various types of flagpoles and pole heights
Flagpole Type Flagpole Height in Feet Flag Size in Feet
wall-mounted 5′ 2.5×4
wall-mounted 6′ – 8′ 3×5
in-ground 15′ 3×5
in-ground 20′ 3×5
in-ground 25′ 4×6
in-ground 30′ 5×8
in-ground 40′ 6×10
in-ground 50′ 8×12
in-ground 60′ 10×15
in-ground 70′ 12×18
in-ground 80′ 15×25
in-ground 90′ 15×25
in-ground 100′ 15×25

If you’re creating your own flag or looking for dimensions of the various components on the flag, refer to our American Flag Calculator.