Flag Size Chart and Buying Guide: How to Choose the Right Flag Size

Not sure what size flag you need? Our easy-to-use flag size chart and sizing guide will help you match the perfect flag to your pole height and display location. Whether you’re flying an outdoor U.S. flag, setting up an indoor presentation set, or planning a large commercial display, choosing the right flag size ensures your display looks balanced, professional, and respectful.

At Tidmore Flags, we’ve been helping customers find the ideal flag and pole combination since 1963 — proudly offering Made in the USA quality that stands the test of time. This guide covers:

• Choosing the right flag size meaning (why proportion and etiquette matter)
• A simple flag size “calculator” rule based on pole height
• Standard flag size in feet, inches, and cm
• Flag size charts for outdoor poles, house mounts, indoor sets, and hand flags
• How to choose flags for state flags, military flags, international flags, and more

Use the sections and charts below to find the ideal flag size for your pole height and display location. At the end, you’ll also find links to guides on cleaning and caring for outdoor flags and storing your flags respectfully.

What Does “Choosing the Right Flag Size” Really Mean?

Choosing the right flag size isn’t just about picking something that “fits” the pole. The correct size:

• Looks proportional to your house, building, or flagpole
• Protects your flagpole from unnecessary stress in high winds
• Helps keep the flag off the ground, even when flown at half-staff
• Respects flag etiquette and the meaning behind the American, state, and military flags you fly

A flag that’s too small can look lost and underwhelming. A flag that’s too large can overpower the pole, tangle easily, and may brush the ground when lowered — something the U.S. Flag Code says should be avoided. The goal is a display that is balanced, dignified, and safe.

Simple Flag Size “Calculator” for Outdoor Flagpoles

You don’t need a complex tool to figure out the right flag size. Think of this as your flag size calculator that you can do in your head:

Flag length ≈ ¼ to ⅓ of flagpole height

For example:

• On a 20 ft pole, a 3×5 ft or 4×6 ft flag works well.
• On a 25 ft pole, a 4×6 ft flag is a great match.
• On a 30 ft pole, a 5×8 ft flag looks proportional.

This simple rule keeps your flag from overpowering the pole, reduces stress on hardware, and helps ensure the flag won’t touch the ground when flown at half-staff.

Most residential in-ground flagpoles are between 15–25 ft. If you’re not sure, a 3×5 ft or 4×6 ft flag is almost always a safe choice for homes.

Outdoor Flag Sizes (Full Flag Size Chart)

Outdoor flags come in a wide range of sizes to suit residential, commercial, and institutional displays. As a general rule, the length of your flag should be about one-quarter the height of your flagpole. Use the table below to find the right match, then pair your size with a durable outdoor American flag, state flag, or military/service flag.

Standard Flag Size for a House

If you’re wondering, “What is the standard flag size for a house?”, the answer is simple:

The standard house flag size is 3×5 ft.

A 3×5 ft flag:

• Works perfectly on most house-mounted (wall) flagpoles (5–6 ft long)
• Is ideal for most 15–20 ft in-ground residential flagpoles

Smaller spaces such as balconies can use a 2×3 ft flag, while taller in-ground poles (around 25 ft) may look better with a 4×6 ft flag. You can pair these with your favorite state flag, military branch flag, or international flag for a meaningful display.

Standard Flag Size in Feet, Inches & Centimeters

When people search for standard flag size in feet or standard flag size in inches, they’re usually referring to the classic American house flag. Here’s how common sizes convert:

• 2×3 ft flag
  • In inches: 24×36 inches
  • In cm: ~61×91 cm
  • Use: Smaller homes, balconies, tight spaces
• 3×5 ft flag (most common “standard” size)
  • In inches: 36×60 inches
  • In cm: ~91×152 cm
  • Use: Most homes and residential outdoor displays
• 4×6 ft flag
  • In inches: 48×72 inches
  • In cm: ~122×183 cm
  • Use: 25 ft poles, larger homes, small institutional sites
• 5×8 ft flag
  • In inches: 60×96 inches
  • In cm: ~152×244 cm
  • Use: 30 ft poles, schools, hospitals, larger commercial buildings

These sizes also apply across state flags, military flags, and international flags when flying them outdoors.

Flying Two Flags on One Pole: Avoid “Over-Flagging”

If you want to fly a U.S. flag with a state, military, POW/MIA, or first responder flag on the same pole, it’s important not to overdo the total fabric area.

A good rule is to keep the combined square footage of multiple flags close to (or slightly less than) the area of the largest recommended single-flag size for that pole.

Example for a 20 ft pole:

• Max single flag: 4×6 ft (24 sq ft)
• Good two-flag combo: 3×5 ft U.S. flag (15 sq ft) + a 2×3 ft state or service flag (6 sq ft) = 21 sq ft total

This keeps the pole safe, the display attractive, and the flags flying freely without too much tangling.

Indoor & Presentation Set Flag Sizes

Indoor and ceremonial flags are designed for formal environments such as offices, auditoriums, churches, and government chambers. These flags are typically made from nylon or cotton with gold fringe and a pole hem sleeve for presentation poles. You can browse complete sets in our indoor U.S. flags & presentation sets collection.

Stick Flags & Hand-Held Sizes

Stick flags, also called hand-held or desk flags, are perfect for parades, school programs, and memorial displays. These small flags are typically mounted on wooden or plastic staffs and used indoors or in light outdoor conditions.

What If I Don’t Know My Flagpole Height?

If you’re trying to choose the right flag size but don’t know your pole height, you have a few options:

• Estimate based on typical heights: Most residential in-ground poles are 15–25 ft. - Shorter than your roof peak: likely 15–20 ft (3×5 ft flag) - Clearly above a one-story roof: likely 20–25 ft (3×5 or 4×6 ft flag)
• Use the halyard (rope): Measure the rope, divide by two, then add ~5 ft to estimate pole height.
• Use shadow measurements: Compare the pole’s shadow to a measured stick’s shadow and calculate height using basic proportions.

Once you have a rough height, apply the ¼–⅓ rule and reference the flag size chart above to select your size in feet, inches, or centimeters.

Other Factors to Consider When Choosing a Flag Size

Size is only part of the decision. When purchasing an American flag, state flag, or any outdoor display, also consider:

1. Wind Conditions

High-wind areas put extra stress on both the flag and the flagpole. In stronger wind zones, you may:

• Select a slightly smaller flag for a given pole height
• Choose a more durable material like heavy-duty polyester American flags

2. Flag Material

Your material choice affects how large a flag your pole can handle and how long it will last:

• Nylon – Lightweight, flies easily, dries quickly; great all-around option for most homes.
• Polyester – Heavier and tougher; ideal for larger flags and high-wind or open sites.
• Cotton – Traditional and beautiful; best for indoor or ceremonial use.

For a deeper dive into nylon vs. polyester vs. cotton, watch for our guide on flag materials and durability.

3. Display Location & Purpose

• Homes: A 3×5 ft flag with a 5–6 ft house-mount pole or 15–20 ft in-ground pole is the standard.
• Small businesses & schools: 4×6 ft on 25 ft poles or 5×8 ft on 30 ft poles for visibility.
• Large commercial or civic sites: 6×10, 8×12, or larger flags on tall commercial poles.

Tips for Choosing the Right Flag Size

• Outdoor flag length should be about ¼ to ⅓ the height of your flagpole.
• Ensure adequate clearance from trees, buildings, or power lines.
• Use nylon flags for light to moderate winds and polyester flags for high-wind areas.
• Larger flags exert more stress on poles—always confirm your pole’s wind rating.
• Match flag size with the surroundings: bigger homes and buildings can support larger flags.

Still unsure what size flag you need? Our team at Tidmore Flags has been helping customers choose the right display since 1963. Contact us for personalized recommendations on flag sizes, materials, and mounting options

Ready to buy? Explore:

• Outdoor American Flags
• State Flags
• Military & Service Flags
• First Responder Flags
• International Flags
• Outdoor Flagpoles
• House-Mounted Flagpoles

Choose the right size, pick the right material, and your flag will look great and fly proudly for seasons to come.