Choosing the Right Size Flag for a Flagpole

Selecting the correct flag size for a flagpole might seem challenging, but there are some easy tips you can use to get it right. The first thing to consider is whether you’ll be installing a house-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 house-mounted flagpoles, the process is a little different. Simply put, we recommend using a 2 1/2′ x 4′ flag for a 5′ pole and a 3′ x 5′ flag for poles larger than 5′.

Recommended Flag Size for Flagpole

Recommended flag size for various types of flagpoles and pole heights
Flagpole Type	Flagpole Height in Feet	Flag Size in Feet
house mounted	5′	2.5×4
house 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.