Washington State Flag Size Guide: What Size Washington Flag Should You Fly?
Share
Pole height determines the size — no guesswork needed. Here is every setting covered, from a Seattle porch bracket to an Eastern Washington commercial pole, plus the U.S. flag pairing rules and regional tips for the Evergreen State.
Written by Tidmore Flags product specialists. We have supplied American-made flags since 1963. Sizing guidance in this post is based on established pole-to-flag ratios, verified Washington State climate data from the Washington State Climate Office and NOAA's 2022 State Climate Summary, and hands-on product knowledge from six decades in the industry.
The Washington state flag is one of the most visually distinctive in the country — the only state flag with a green field, and the only one to show a president's portrait. Getting the size right matters as much for visual proportion as for practical flag life: a flag too large for its pole catches too much wind and wears out fast; one too small disappears against the sky and misses the whole point of flying it.
The answer to the size question is straightforward once you know your pole height. Here is the complete breakdown for every Washington display situation.
Looking to buy a Washington flag? Shop our Washington state flag collection.
Quick Answer: Size by Pole Height
The core rule is simple — flag length should equal roughly 25% of pole height. Every common Washington pole height, mapped to the correct flag size:
Complete Washington State Flag Size Chart
| Pole Height | Flag Size | Typical Washington Setting | Notes |
|---|---|---|---|
| 5–6 ft bracket | 2' × 3' | Standard angled house-mount bracket; front porch; garage wall mount | Flag length must not exceed bracket length or the flag will wrap onto siding in wind. The most common bracket size in Seattle, Tacoma, and Bellevue neighborhoods. |
| 8 ft bracket | 3' × 5' | Longer residential bracket on larger homes; colonial-style entryway | Confirm clearance from the house — the flag's fly end needs free 360-degree swing room equal to the flag's length. |
| 15 ft | 3' × 5' | Shorter in-ground residential poles; townhome yards; narrow urban lots | 3×5 is proportionally correct and the most common size in dense Puget Sound neighborhoods where pole height is limited. |
| 20 ft | 3' × 5' | Standard single-family residential — Seattle suburbs, Spokane, Olympia, Yakima, Bellingham | The 20-foot in-ground pole with a 3×5 flag is the most common residential setup throughout Washington State. |
| 25 ft | 4' × 6' | Larger residential lots; rural Eastern Washington properties; small businesses; farm entrances | The step up from 3×5 gives the flag noticeably more presence. Appropriate for agricultural properties in the Columbia Basin and Yakima Valley where the flag needs to be seen across open ground. |
| 30–35 ft | 5' × 8' | K-12 schools, fire stations, municipal buildings, medium commercial, marinas | Standard commercial size statewide. Clearly readable from the street; correct for government and institutional settings across both sides of the Cascades. |
| 40–50 ft | 6' × 10' | County courthouses, university campuses, ferry terminals, larger commercial properties | Appropriate for Puget Sound ferry terminals and waterfront commercial buildings where high visibility and consistent wind exposure are both factors. |
| 60–80 ft | 8' × 12' | Auto dealerships, airports, large state facilities, major commercial sites along Interstate corridors | Largest standard size. Requires reinforced hardware, professional installation, and regular inspection — particularly important in coastal and Gorge-adjacent locations. |
The 25% rule in practice. Flag length should equal roughly one-quarter of pole height. On a 20-foot pole, 20 × 0.25 = 5 feet of flag length — matching a 3×5 foot flag. On a 30-foot pole, 30 × 0.25 = 7.5 feet — matching a 5×8. Going larger than this puts unnecessary wind load on the flag and hardware; going smaller produces a flag that looks undersized and does not honor Washington's distinctive design the way it deserves to be seen.
Size by Display Setting
Every Washington display situation has a right answer. Here is the full breakdown by setting type.
House-Mount Bracket
2×3 (5–6 ft bracket) · 3×5 (8 ft bracket)The angled bracket pole is the most common single-flag setup in Washington's residential neighborhoods — from Kirkland cul-de-sacs to Spokane Valley front stoops. The critical rule: match flag length to bracket length. A 5-foot bracket takes a 2×3 flag. An 8-foot bracket handles a 3×5. A flag that overhangs the bracket tip will wrap around the house in Western Washington's fall and winter winds, damaging both the flag and siding.
Residential In-Ground Pole
3×5 (15–20 ft) · 4×6 (25 ft)The in-ground pole is the standard flag setup for single-family homes throughout Washington. Most homes in the Puget Sound region, Spokane, the Tri-Cities, and Bellingham use 15- to 20-foot poles — a 3×5 flag is correct for all of these. If you have upgraded to a 25-foot pole for a larger lot or more street presence, move to the 4×6.
Farm and Rural Property
4×6 (25 ft) · 5×8 (30–35 ft)Eastern Washington's wheat fields, apple orchards, and livestock ranches often use taller poles — 25 to 35 feet — because the flag needs to be visible across open land. Use the 4×6 on a 25-foot pole and the 5×8 on a 30- to 35-foot pole. The Columbia Basin's open terrain and hot, dry summers mean higher UV exposure, making material choice as important as size for rural display.
Small Business or Commercial Building
5×8 (30–35 ft pole)The standard commercial flag setup throughout Washington — retail, medical, light industrial, hospitality — typically uses a 30- to 35-foot pole with a 5×8 flag. This size reads clearly from the street. For businesses near the coast, Puget Sound, or along the Columbia Gorge corridor, the sustained wind environment makes polyester the right material at this size.
School or Government Building
5×8 (30–35 ft) · 6×10 (40–50 ft)Washington public schools, city halls, county courthouses, and tribal government buildings use 30- to 50-foot poles depending on building scale and site. Use a 5×8 on a 30-35 foot pole; step up to 6×10 on 40-50 foot poles. These flags fly daily and should be polyester for institutional-grade durability and color retention through Washington's wet season.
Marina and Waterfront Display
Size to pole height — always polyesterWashington has one of the most extensive shoreline systems in the country — Puget Sound, the San Juan Islands, Grays Harbor, the Columbia River mouth, and thousands of marina slips. Waterfront display means salt air, persistent wind, and high humidity. Whatever size fits your pole, choose polyester for any waterfront, marina, or strait-facing installation without exception.
Mountain Cabin or Retreat Property
3×5 (most) · 4×6 (taller poles)Washington's Cascades, the North Cascades, and the Olympic Peninsula draw cabin and vacation property owners across the state. Most of these properties use 15- to 25-foot poles. Match size to pole height as standard. Properties at elevation or on exposed ridge terrain — particularly on the west side of the Cascades — can see Pacific storm wind that arrives with little warning. Polyester is the sensible material for mountain display.
Indoor or Ceremonial Display
3×5 (standard) · 4×6 (formal)Indoor Washington state flags for offices, school classrooms, government hearing rooms, tribal council chambers, and military facilities use 3×5 on a 7- to 8-foot indoor presentation pole for most settings, and 4×6 on a 9-foot pole for larger formal rooms. Our indoor Washington flag comes with a pole hem sleeve and gold fringe — no grommets, no outdoor installation needed.
Washington's Two Climates: What They Mean for Your Flag
Size is always determined by pole height — that answer does not change based on geography. But Washington's dramatic climate divide does affect material choice and how long your flag will realistically last, and it is worth understanding before you buy.
The Cascade Mountain Range splits Washington into two fundamentally different worlds. Western Washington — where about 60% of the state's population lives, in cities like Seattle, Tacoma, Olympia, Bellingham, and Everett — is governed by a marine climate driven by the Pacific Ocean. Winters are cool and frequently overcast, summers are mild and relatively dry. Average annual precipitation in the Puget Sound Lowland runs 30 to 40 inches, delivered mostly as persistent drizzle through fall and winter rather than heavy downpours. Wind at ground level in the greater Seattle area averages roughly 8 to 11 mph seasonally, calming in summer and picking up from the southwest in winter storm season.
Cross the Cascades east and the climate transforms entirely. The mountains capture most of the Pacific moisture before it reaches eastern Washington. Cities like Wenatchee, Ellensburg, and the Tri-Cities enjoy up to 300 days of sunshine per year, with annual rainfall of just 7 to 9 inches in the central Columbia Basin. Spokane, at the eastern edge of the state near the Idaho border, gets 15 to 17 inches annually — still a fraction of the west side. Eastern Washington summers are genuinely hot, regularly reaching the upper 80s and 90s°F, and winters are colder and snowier than anywhere on the coast.
Quinault, on the windward western slopes of the Olympic Mountains, averages 151 inches of annual precipitation — among the highest in the continental U.S. Sequim, just 56 miles away on the northeastern Olympic Peninsula rain shadow, averages only 24 inches. That is a 127-inch difference within the same county. Washington's terrain creates microclimates this extreme, which is why regional location matters more than statewide generalizations when choosing flag material. Know your specific setting, not just your state.
By Region: Washington State Flag Sizing Context
The size answer is always pole height. The regional guidance below covers the material and practical display considerations specific to each major Washington region — relevant once you have the right size.
Greater Seattle and Puget Sound Lowland
Size by pole height — Nylon for most residential; Polyester for exposed waterfrontSeattle, Tacoma, Bellevue, Everett, Renton, and Kirkland sit in the sheltered Puget Sound corridor. Marine air, persistent drizzle, and mild temperatures characterize the climate. Wind at street level is moderate — 8 to 11 mph in winter, calmer in summer. Nylon is the right residential choice: it dries quickly after rain and flies well in the Sound's characteristically light breezes. For exposed waterfront, ferry-terminal-facing, and hilltop commercial sites, polyester holds up better in the stronger and more consistent wind those locations see.
Olympia and South Puget Sound
Size by pole height — Nylon (most); Polyester for exposed government / institutional polesWashington's capital sits at the southern end of Puget Sound. The climate is similar to Seattle — marine, mild, frequently cloudy in winter and spring. Most residential properties in Olympia, Tumwater, and Lacey are fine with nylon. The state Capitol campus and large government-facility poles that fly daily and face more open exposure should use polyester for durability and color retention through the long wet season.
Olympic Peninsula and Coastal Washington
Size by pole height — Polyester for coast-facing; Nylon for Sequim microclimateThe western Olympic Peninsula and coastal communities like Forks, Aberdeen, and Westport receive among the heaviest rainfall in the continental U.S. Persistent Pacific wind, salt-laden coastal air, and high humidity make this the most demanding flag environment in the state. Polyester is the only reasonable choice for any coast-facing or ocean-exposed installation here. The notable exception is the Sequim-Port Angeles area on the northeastern peninsula, sheltered by the Olympic rain shadow, where the climate is noticeably drier and nylon performs well for residential use.
North Puget Sound and Bellingham Area
Size by pole height — Nylon inland; Polyester for strait-facing and waterfront sitesBellingham and the communities along the Salish Sea face toward the Strait of Juan de Fuca, where marine winds are stronger and more consistent than the sheltered southern Sound. Properties with direct water views toward the San Juan Islands or the Strait should use polyester. Inland Whatcom County and Skagit County residential properties — more sheltered by terrain — are fine with nylon.
Columbia Gorge and Southwest Washington
Size by pole height — Polyester for Gorge-exposed sites without exceptionThe Columbia River Gorge is one of the windiest corridors in the Pacific Northwest — a natural wind tunnel channeling air between the Oregon and Washington sides of the Cascades. Wind speeds in the Gorge regularly exceed 20 to 30 mph and the area is internationally known for wind sports. Any property with direct exposure to the Gorge wind corridor needs polyester, period. Vancouver and Longview, sheltered from the Gorge's direct wind, are generally fine with nylon for residential display.
Central Washington — Wenatchee, Ellensburg, Yakima Valley
Size by pole height — Nylon (most settings); Polyester for large exposed commercial polesCentral Washington is nearly plains-like in terrain, with open rolling hills giving way to the Columbia Basin. Up to 300 sunny days per year means higher UV intensity than the cloudy west side — something to factor into expected flag lifespan. Annual rainfall is just 7 to 9 inches in the central basin. Nylon works well for residential display throughout this region; the higher UV means monitoring for fading more regularly than in the overcast Puget Sound climate. Large commercial farm and ranch poles in fully open terrain should consider polyester for the wind exposure.
Spokane and Eastern Washington
Size by pole height — Nylon (most); Polyester for exposed commercialSpokane, Pullman, Walla Walla, and the Tri-Cities experience a continental climate with genuine seasonal swings — hot summers, cold winters, and 15 to 17 inches of annual rain in Spokane. The open terrain of Eastern Washington means wind exposure is less sheltered than in valley and city locations on the west side. Nylon is right for most residential and commercial display. The consistently sunny climate means UV exposure is meaningfully higher than west-side locations, so flags fade faster and should be checked more frequently.
San Juan Islands
Size by pole height — Polyester alwaysThe San Juan Islands are surrounded by open water on all sides and exposed to the tidal winds of the Salish Sea year-round. Salt air, consistent marine wind, and high humidity define the environment here. Every outdoor flag installation in the San Juans — residential or commercial — should use polyester. Salt spray accelerates grommet and header wear; rinse flag hardware regularly and inspect seams more frequently than mainland owners would.
Match the sizes. When flying the Washington state flag alongside the U.S. flag, both should be the same size — a 3×5 Washington flag with a 3×5 U.S. flag, a 4×6 with a 4×6. The Washington flag should never be larger than the U.S. flag.
Position of honor. The U.S. flag always flies in the position of honor — at the peak when on the same pole (Washington state flag below it on the same halyard), or on the flagpole to its own right (the observer's left when facing the flags) when on separate poles at equal height.
Raising and lowering. On adjacent poles, hoist the U.S. flag first and lower it last. Neither flag should be left flying when conditions require taking down one of them — both come down together in severe weather.
We offer U.S. and Washington nylon flag bundles and U.S. and Washington polyester flag bundles — both flags matched in the same size and material so you never have to cross-reference separately.
Indoor Washington State Flag Sizing
Indoor presentation flags — for government offices, school classrooms, courtrooms, tribal government buildings, and military facilities — do not follow the 25% pole-height rule. They follow the room and pole dimensions instead.
The standard indoor size is 3×5 feet, which pairs with a 7- to 8-foot indoor presentation staff and works well in most office, classroom, and meeting room settings. For larger formal spaces — legislative hearing rooms, auditoriums, official courtrooms — a 4×6 foot flag on a 9-foot staff has the visual weight appropriate to the setting.
Our Washington indoor flag with pole hem sleeve and gold fringe is built for these settings — nylon construction, reinforced sleeve that slides onto standard indoor staffs, and rayon gold fringe on three sides for a formal ceremonial finish. Washington's deep green field and gold-framed seal look particularly striking against the gold fringe in any official setting.
Still Not Sure Which Size?
Tell us your pole height and your Washington location — Seattle neighborhood, Eastern Washington farm, Olympic Peninsula cabin, or San Juan Island waterfront — and we will give you a direct answer. Call (800) 321-3524 or reach out through our site. We have been doing this since 1963 and are glad to help.
Have the size sorted and want to understand the flag itself? Washington's green banner is the only state flag with a president's portrait, and the design has a specific history worth knowing. Read the History of the Washington State Flag to learn where the design came from and what it actually represents.
Washington State Flag Size — Frequently Asked Questions
Q: What size Washington state flag do I need for a 20-foot pole?
A 3×5 foot flag is the standard size for a 20-foot residential pole. This follows the guideline that flag length should equal approximately 25% of pole height. It is the most common Washington state flag size for homes throughout Seattle, Tacoma, Spokane, Yakima, and their surrounding suburbs.
Q: What size Washington state flag fits a house-mount bracket?
For a standard 5- to 6-foot angled bracket, use a 2×3 foot flag. For an 8-foot bracket, a 3×5 works well. The flag length should not exceed the bracket length — if it does, the flag will wrap around the house in any wind, which damages both the flag and your siding over time.
Q: Should my Washington state flag be the same size as my U.S. flag?
Yes. When flying both together, match the sizes. The U.S. flag always flies in the position of honor — at the peak when on the same pole, or on the pole to its own right (the observer's left) when on separate poles at equal height. The Washington state flag should never be larger than the U.S. flag.
Q: What size Washington state flag do I need for a 25-foot pole?
A 4×6 foot flag is the correct size for a 25-foot pole. It gives the flag more visual presence proportionate to the taller pole, following the 25% guideline (25 × 0.25 = 6.25 feet of flag length, making 4×6 the standard match).
Q: Does Washington State's climate affect what size flag to buy?
Size is always determined by pole height and does not change with climate. However, Washington's geography — wet and mild west of the Cascades, dry and sunny to the east — does affect material choice significantly. Nylon is right for most Puget Sound residential settings; polyester holds up better for coastal, strait-facing, Gorge-adjacent, and commercial locations with sustained wind and salt air.
Q: What is the standard flag-to-pole ratio?
Flag length should equal approximately 25% of pole height. A 20-foot pole takes a 3×5 flag. A 25-foot pole takes a 4×6. A 30-foot pole takes a 5×8. A 40-foot pole takes a 6×10. This ratio keeps the flag proportionally visible and avoids putting excess wind load on the fabric, hardware, and pole.
Climate sources: Washington State Climate Office (climate.uw.edu) | NOAA State Climate Summary 2022 — Washington | Western Regional Climate Center — Washington Climate Narrative | Choose Washington State — Climate and Geography | Hansen Bros. Moving — Weather Patterns of Washington State
tidmoreflags.com | (800) 321-3524 | American-Made Flags Since 1963
Shop Washington State Flags — American-Made
The only state flag with a green field and a president's portrait. Every size, every setting — 100% made in the USA.
