Every Door Direct Mail (EDDM) remains one of the most cost-effective ways to reach every household in a neighborhood without buying a mailing list. But if your postcard doesn’t meet USPS size requirements, your entire campaign can be rejected at the post office—costing you time, money, and momentum.
In 2026, USPS EDDM size rules are precise and non-negotiable. Whether you’re a real estate agent farming a subdivision, a roofer targeting storm-damaged areas, or an HVAC contractor promoting seasonal tune-ups, understanding these specs upfront will save you from costly reprints and delays.
This guide breaks down the exact EDDM postcard size requirements, approved dimensions, weight limits, and design best practices so you can confidently plan your next saturation mail campaign.
What is EDDM and Why Size Matters
Every Door Direct Mail is a USPS service that lets businesses mail postcards, flyers, and menus to every address on a carrier route without addressing each piece individually. You select routes by geography, then deliver bundled mail directly to your local post office. Because there’s no list purchase or individual addressing, EDDM typically costs between $0.20 and $0.25 per piece—a fraction of standard direct mail.
But to qualify for these retail EDDM rates, your printed piece must fall within strict size parameters. Go too small or too large, and USPS will classify it as standard mail, requiring full postage and individual addressing. Miss the thickness or weight limits, and your mail won’t be accepted at all.
Official EDDM Size Requirements for 2026
USPS defines EDDM-eligible mail by three critical dimensions: length, height, and thickness. Here are the exact specifications your postcard must meet:
Minimum and Maximum Dimensions
- Minimum size: 10.5 inches long × 6.25 inches high
- Maximum size: 15 inches long × 12 inches high
- Thickness: No more than 0.25 inches thick
- Weight: No more than 3.3 ounces
Your postcard must be rectangular—USPS does not accept die-cut, circular, or irregular shapes for EDDM. All four corners must be square or slightly rounded (maximum 0.125-inch radius).
Most Popular EDDM Postcard Sizes
While any dimension within the range above qualifies, three sizes dominate EDDM campaigns because they balance visibility, cost, and print efficiency:
- 6.25″ × 9″ – Compact and affordable; fits standard postcard templates
- 6.5″ × 11″ – Slightly larger; provides more design real estate
- 6.5″ × 12″ – Maximum impact without reaching oversized pricing
Larger formats like 8.5″ × 11″ (standard letter size) and 11″ × 12″ (jumbo postcard) are also EDDM-compliant and deliver high visibility in the mailbox. Many contractors and real estate agents use jumbo postcards for grand opening announcements, major listings, or seasonal promotions where standing out is worth the extra print cost.
Paper Stock and Thickness Guidelines
EDDM postcards must be sturdy enough to travel through postal equipment without bending or tearing, but not so thick they exceed USPS limits. Most printers recommend:
- 14pt or 16pt cardstock for standard EDDM postcards
- 100 lb. gloss or matte cover stock as an alternative
- UV coating or aqueous coating for added durability and visual pop
Avoid using paper thinner than 12pt—it feels flimsy and reduces perceived value. Going above 16pt is unnecessary and risks exceeding the 0.25-inch thickness limit if you add folds or extra layers.
Design and Layout Best Practices for EDDM Postcards
Meeting size requirements is step one. Designing a postcard that actually drives calls and conversions is step two. Here’s how to maximize response rates within USPS specs:
Keep Critical Information Away from Edges
Always leave at least a 0.25-inch margin around all edges. USPS sorting equipment can nick or smudge the perimeter, and professional printers require bleed zones to avoid white borders. Keep your phone number, website, and call-to-action at least 0.5 inches from any edge.
Use High-Contrast Headlines and Clear CTAs
Your postcard has roughly three seconds to grab attention in a stack of mail. Use bold, large-type headlines that communicate the offer immediately. Real estate agents should lead with “Just Sold on Your Street” or “Free Home Value Report.” HVAC contractors might use “Spring AC Tune-Up – $79” or “24-Hour Emergency Service.”
Place your primary call-to-action—phone number, QR code, or URL—in the top right or center of the postcard where eyes naturally land.
Include Tracking Mechanisms
One of the biggest objections to direct mail is “How do I know if it works?” Build tracking into your EDDM design:
- Unique phone numbers: Use call tracking software to assign a dedicated number to each EDDM drop
- QR codes: Link to a landing page tagged with UTM parameters
- Promo codes: Offer a discount or bonus tied to a unique code
- Personalized URLs: Direct recipients to a custom domain like YourCity.YourBusiness.com
These methods let you calculate true response rates and cost-per-lead, turning EDDM from “spray and pray” into a measurable ROI channel.
EDDM Postcard Costs in 2026
Understanding the full cost picture helps you budget accurately and set realistic expectations. Here’s the breakdown:
USPS Retail Postage
EDDM Retail postage in 2026 is approximately $0.20 to $0.25 per piece, depending on the final size and weight of your mail. This rate applies regardless of distance—mailing across town costs the same as mailing across your state.
Printing Costs
Printing costs vary by quantity, size, and finishing:
- 1,000 postcards (6.5″ × 11″, 14pt, full color both sides): $150–$250
- 5,000 postcards: $0.10–$0.15 per piece
- 10,000+ postcards: $0.08–$0.12 per piece
Larger sizes like 8.5″ × 11″ or 11″ × 12″ typically add $0.02 to $0.05 per piece. UV coating, rounded corners, and custom finishes add minor upcharges but can improve perceived quality and response rates.
Total Cost Per Piece
For a typical 5,000-piece EDDM campaign using 6.5″ × 11″ postcards, expect to pay roughly $0.35 to $0.40 per piece all-in (printing plus postage). That’s $1,750 to $2,000 to reach 5,000 households—far less than the equivalent cost in Facebook ads, Google pay-per-click, or targeted display campaigns.
How to Prepare and Submit EDDM Postcards to USPS
Once your postcards are printed to spec, you’ll need to bundle and deliver them to your local post office. Here’s the streamlined process:
Step 1: Select Your Carrier Routes
Use the USPS EDDM Online Tool to browse carrier routes by zip code. Each route typically covers 400 to 600 residential addresses. You can filter routes by age, income, and household size to refine targeting.
Step 2: Print USPS-Required Facing Slips
USPS requires a facing slip for each carrier route. These labels identify the route number, delivery date, and mail count. You can generate and print facing slips directly from the USPS EDDM tool.
Step 3: Bundle Postcards by Route
Group postcards into bundles of 50 to 100 pieces, with the facing slip on top, secured with rubber bands or shrink wrap. Do not mix routes in a single bundle.
Step 4: Deliver to Your Post Office
Bring bundled mail and payment to the Business Mail Entry Unit (BMEU) at your local post office. Bring a printed USPS receipt (generated online) and be prepared to pay via check or business account. Most post offices request at least 3–5 business days’ notice for EDDM drops.
Many businesses—especially real estate agents and contractors running monthly campaigns—outsource this entire process to a full-service direct mail partner like Shop Direct Mail. From route selection and design to bundling and post office delivery, handling it in-house saves time and reduces the risk of rejected mail.
Common EDDM Size Mistakes to Avoid
Even experienced marketers occasionally miss these details. Here’s what to watch for:
- Designing below the 10.5″ × 6.25″ minimum: Standard 4″ × 6″ postcards are too small for EDDM
- Using non-rectangular shapes: Die-cuts and rounded edges beyond 0.125″ radius are disqualified
- Exceeding 3.3 ounces: Multi-page brochures or thick card stock can push you over the weight limit
- Forgetting bleed zones: Designs that run to the edge without bleed will have visible white borders after trimming
- Printing on one side only: While allowed, single-sided EDDM postcards waste valuable real estate and reduce response rates
Who Should Use EDDM Postcards?
EDDM is ideal for businesses that benefit from geographic saturation rather than narrow demographic targeting. Top use cases include:
Real Estate Agents and Teams
Agents use EDDM to farm neighborhoods, announce new listings, promote open houses, and generate buyer and seller leads. A 500-home farm mailed monthly for six months builds top-of-mind awareness and typically generates 1–3 listing appointments per quarter.
Contractors (HVAC, Roofing, Plumbing, Landscaping)
Contractors use EDDM to saturate zip codes after storms, promote seasonal maintenance offers, and build brand recognition in service areas. A roofer mailing 10,000 homes after a hailstorm can expect 20–50 calls and 5–15 closed jobs, depending on storm severity and offer strength.
Local Service Businesses
Mortgage brokers, fitness studios, auto repair shops, and restaurants use EDDM to introduce themselves to new neighborhoods, promote grand openings, and reactivate lapsed customers within a defined radius.
Tracking and Measuring EDDM Results
Direct mail is only as good as your ability to measure it. In 2026, expect these benchmarks:
- Response rates: 0.5% to 2% for cold audiences; 3% to 5% for repeat mailings in farmed areas
- Cost per lead: $20 to $50 for service businesses; $50 to $150 for real estate and high-ticket contractors
- ROI: Positive ROI typically requires 2–3 conversions per 5,000-piece drop, depending on average transaction value
Use call tracking numbers, landing pages with UTM codes, and promo codes to attribute leads directly to your EDDM campaign. Keep a simple spreadsheet tracking mail date, route count, response count, and closed deals.
Frequently Asked Questions
What are the exact EDDM postcard size requirements?
EDDM postcards must be between 10.5″ × 6.25″ (minimum) and 15″ × 12″ (maximum), no thicker than 0.25 inches, and no heavier than 3.3 ounces. The most common sizes are 6.25″ × 9″, 6.5″ × 11″, and 6.5″ × 12″.
Can I use a standard 4″ × 6″ postcard for EDDM?
No. Standard 4″ × 6″ postcards do not meet the USPS minimum size requirement of 10.5″ × 6.25″ for EDDM. You’ll need to use a larger format or pay for individually addressed standard mail.
How much does EDDM cost per postcard in 2026?
USPS EDDM Retail postage is approximately $0.20 to $0.25 per piece. Combined with printing costs of $0.08 to $0.15 per postcard, expect total costs of $0.35 to $0.40 per piece for volumes of 5,000 or more.
Do EDDM postcards need return addresses?
USPS does not require a return address for EDDM, but including one builds credibility and trust. Most successful campaigns include a return address, business name, and logo on the mail panel.
How do I track responses from EDDM campaigns?
Use unique phone numbers, QR codes, personalized URLs, or promo codes on each EDDM drop. Call tracking software and landing page analytics let you attribute leads and sales directly to specific mail dates and carrier routes.
Can I mail EDDM postcards myself, or do I need a mailing service?
You can prepare and deliver EDDM yourself by bundling postcards and bringing them to your local post office. However, many businesses outsource to full-service providers like Shop Direct Mail to save time, avoid errors, and ensure USPS compliance.
Get Your EDDM Postcards Printed and Mailed
Understanding EDDM size requirements is just the beginning. To run a successful saturation mail campaign, you also need compelling design, accurate route selection, proper bundling, and on-time delivery to your local post office.
Shop Direct Mail handles every step—from strategy and design to list acquisition, printing, and USPS delivery. Whether you’re a real estate agent launching your first farm or a contractor scaling a multi-route campaign, we make EDDM simple, affordable, and measurable.
Visit our EDDM services page to explore templates, calculate costs, and request a free quote for your next campaign. Let’s turn your neighborhood into your next source of leads.
