EDDM Mailing Requirements: Size, Weight & Postage Rules for 2026

Every Door Direct Mail (EDDM) is one of the most cost-effective ways to reach local customers, but your mailpiece must meet specific USPS requirements or it will be rejected at the post office. Getting the size wrong by a fraction of an inch, using paper stock that is too thin, or forgetting a required marking on your design can derail an entire campaign.

This guide covers every EDDM mailing requirement you need to know in 2026: minimum and maximum sizes, weight and thickness limits, current postage rates, design specifications, and the most common mistakes that cause mailpieces to be returned. Whether you are handling EDDM yourself or working with a commercial mail house, understanding these rules will save you time, money, and frustration.

What Is EDDM?

Every Door Direct Mail is a USPS program that lets you send mailpieces to every residential address (or every address including businesses) on selected postal carrier routes. You do not need a mailing list. You do not need to know anyone's name or address. You simply choose the routes you want to target, and USPS delivers your piece to every door on those routes.

EDDM is popular with restaurants, dental offices, real estate agents, home service companies, and any business that serves a geographic area. It is the cheapest USPS mailing option for local saturation marketing, with postage rates significantly lower than First-Class or Marketing Mail.

EDDM Retail vs. EDDM BMEU

There are two versions of the program:

• EDDM Retail is designed for small businesses. You select routes using the USPS EDDM Online Tool, print your mailpieces, bundle them, and drop them off at your local post office. No mailing permit is required. You pay postage at the counter. The daily limit is 5,000 pieces per ZIP code per day.
• EDDM BMEU (Business Mail Entry Unit) is for larger mailers and commercial mail houses like Mail Processing Associates. There is no daily volume limit. You need a permit imprint, and mail is entered at a USPS Business Mail Entry Unit. This version is ideal for campaigns exceeding 5,000 pieces or for businesses mailing across multiple ZIP codes simultaneously.

Both versions share the same size, weight, and design requirements. The differences are in volume limits, where you drop off, and how you pay for postage.

EDDM Size Requirements

Size is the single most common reason EDDM mailpieces get rejected. Your piece must qualify as a USPS flat (not a letter), and it must fall within specific minimum and maximum dimensions.

Minimum Size

To qualify for EDDM, your mailpiece must exceed at least one of these letter-size thresholds:

• Longer than 11.5 inches
• Taller than 6.125 inches
• Thicker than 0.25 inches

In practice, the most common minimum EDDM size is 6.125" x 11.5" (or its near equivalent, 6.5" x 9"). If your piece does not exceed at least one of those three thresholds, USPS classifies it as a letter, and letters are not eligible for EDDM.

Maximum Size

The maximum EDDM mailpiece size is 12" x 15". No dimension can exceed 15 inches in length or 12 inches in height. The piece must also remain flexible enough to process through USPS flat-sorting equipment.

Common EDDM Sizes

These are the most popular EDDM mailpiece sizes used in the industry:

• 6.5" x 9" — The most affordable option. Compact but still qualifies as a flat. Popular for simple promotions and coupons.
• 8.5" x 11" — Standard letter-size sheet. Familiar to recipients. Good balance of space and cost.
• 9" x 12" — Larger canvas for menus, product showcases, and detailed offers. Strong shelf life.
• 11" x 17" (folded to 8.5" x 11") — Bi-fold format gives you four panels of content. Ideal for menus, catalogs, and multi-offer campaigns.
• 6.5" x 12" — Elongated format that stands out in the mailbox. Great for real estate and home services.

When selecting a size, consider both your design needs and your budget. Larger pieces cost more to print but tend to generate higher response rates. For help choosing the right format for your campaign, see our EDDM design tips guide.

Weight and Thickness Rules

Even if your mailpiece is the correct size, it can still be rejected if it is too heavy, too thick, or too thin.

Maximum Weight

EDDM mailpieces cannot exceed 3.3 ounces (93.6 grams). For single-sheet postcards printed on standard card stock, this is rarely an issue. A 9" x 12" postcard on 14pt card stock weighs approximately 2.1 ounces, well within the limit.

Weight becomes a concern with:

• Multi-page self-mailers or booklets
• Pieces with inserts, coupons, or magnets attached
• Unusually thick paper stock on large-format pieces

If your mailpiece is close to the weight limit, weigh a finished sample (including any coatings, labels, or attachments) before committing to a full print run.

Thickness Requirements

• Minimum thickness: 0.009 inches (roughly equivalent to 7pt card stock). Pieces thinner than this will jam in USPS sorting equipment.
• Maximum thickness: 0.75 inches. This applies to folded pieces, booklets, and any mailpiece with uneven thickness.

Recommended Paper Stocks

For EDDM postcards, these paper stocks are industry standards:

• 14pt card stock — The most popular choice. Rigid, professional feel. Approximately 0.014" thick. Well above the minimum and easy to handle.
• 16pt card stock — Premium feel. Slightly thicker and more durable. Preferred for high-end campaigns.
• 100# gloss cover — Common for self-mailers and folded pieces. Approximately 0.012" thick.
• 80# gloss cover — Thinner option, approximately 0.010" thick. Acceptable but closer to the minimum. Best for folded pieces where multiple layers add total thickness.

At Mail Processing Associates, we recommend 14pt card stock with UV coating for most EDDM postcards. It meets all USPS thickness requirements, feels substantial in the hand, and the coating protects colors during mail processing. Our commercial printing team can advise on the best stock for your specific piece.

EDDM Postage Rates and Payment

One of the biggest advantages of EDDM is its low postage rate. Because you are mailing to every address on a route (saturation mailing) and USPS does not need to sort by individual address, the per-piece cost is dramatically lower than other mail classes.

Current EDDM Postage Rates (2026)

• EDDM Retail: $0.223 per piece
• EDDM BMEU: Rates vary slightly based on entry point and preparation level, but are comparable to Retail rates

Compare this to other USPS mailing options:

• First-Class postcards: $0.56 per piece
• Marketing Mail letters: $0.31 - $0.41 per piece (requires a mailing list and permit)
• First-Class letters: $0.73 per piece

EDDM is roughly 60-70% cheaper than First-Class postage and does not require a mailing list, making it the most affordable option for local saturation campaigns. For a detailed cost breakdown including printing, see our EDDM cost guide.

How Payment Works

EDDM Retail: You pay postage at the post office counter when you drop off your bundled mailpieces. No permit is required. You can pay with a business check, money order, or metered postage. Some post offices accept credit cards. You will need to present a completed PS Form 3587 (EDDM Retail form) for each route.

EDDM BMEU: Postage is paid through a permit imprint account or precanceled stamps. You must have an active USPS mailing permit. Mail is presented at a Business Mail Entry Unit with the appropriate documentation. This is the method used by commercial mailers like Mail Processing Associates, and it allows for much higher daily volumes.

Design and Print Specifications

Your EDDM mailpiece must include specific markings and meet certain design requirements. Missing any of these can result in your mail being returned or charged at a higher postage rate.

Required Address Area

Every EDDM piece must have a designated address area on one side. This area must include:

• The text "EDDM" or "Postal Customer" where the recipient name would normally appear (since you are not addressing individual recipients)
• Your return address (business name and address)
• Proper postage indicia or the text "ECRWSS" (Enhanced Carrier Route Walking Sequence Saturation) in the postage area

The address block should be positioned in the lower-right portion of the mailpiece (when oriented horizontally) or as specified by USPS guidelines for your piece format.

Facing Identification Mark (FIM)

A Facing Identification Mark (FIM) is not required for EDDM flats. FIM marks are only required for letter-size automation mail. Since EDDM mailpieces must qualify as flats, you do not need a FIM. However, if your piece happens to be close to letter dimensions, adding a FIM C pattern is a safeguard some mailers use.

Indicia Placement

The postage indicia (the marking that shows postage has been paid) goes in the upper-right corner of the address side. For EDDM Retail, you can use the standard EDDM indicia text. For EDDM BMEU, you will use your permit imprint. The indicia area should be approximately 1" x 1.5" and must not overlap with other design elements.

Design Best Practices for Compliance

• Keep the address panel clear. Do not place heavy graphics, dark backgrounds, or competing text in the address area. USPS requires a light or white background behind the address block for readability.
• Account for print bleed. Add 0.125" bleed on all sides of your design. This prevents white edges if the cut is slightly off during printing.
• Use CMYK color mode. Design files should be in CMYK, not RGB. CMYK produces accurate color reproduction on press.
• Set resolution to 300 DPI. Lower resolution results in blurry text and images. All images and graphics should be at least 300 DPI at the final print size.
• Include a clear call to action. Every effective EDDM piece tells the recipient exactly what to do next: call, visit, scan a QR code, or redeem an offer. For more on effective layouts, read our EDDM postcard design tips.

Common EDDM Mistakes to Avoid

After processing thousands of EDDM campaigns at Mail Processing Associates, we see the same mistakes repeatedly. Avoiding these will save you time and money.

1. Mailpiece Is Too Small

This is the most frequent rejection reason. If your postcard is 6" x 9" instead of 6.5" x 9", it does not qualify as a flat, and USPS will refuse it for EDDM. Always verify that your finished piece exceeds at least one letter-size threshold (longer than 11.5", taller than 6.125", or thicker than 0.25").

2. Forgetting the Address Area

Your designer creates a beautiful full-bleed design and forgets to leave space for the EDDM address block, return address, and postage indicia. The address panel must be planned from the start, not squeezed in as an afterthought.

3. Paper Stock Is Too Thin

Using 60# or 70# text weight paper for an EDDM postcard will not meet the 0.009" minimum thickness requirement. Even if it technically passes, thin stock feels flimsy, gets damaged in transit, and undermines your brand. Stick with 14pt or thicker card stock for postcards.

4. Incorrect Bundling

EDDM Retail mailpieces must be bundled in groups that match the carrier route delivery counts. Each bundle should contain between 50 and 100 pieces, secured with rubber bands or shrink wrap. Facing slips (provided by the EDDM Online Tool) must be placed on top of each bundle. Incorrect bundling is a common reason post offices refuse drop-offs.

5. Choosing the Wrong Routes

Not all carrier routes are equal. A route with 800 residential deliveries in your target demographic is more valuable than a route with 200 deliveries in an area outside your service radius. Use the EDDM route selection tool to view delivery counts, residential vs. business breakdowns, and demographic data before committing to routes.

6. Not Checking Residential Counts

EDDM Retail is limited to residential deliveries (plus PO Boxes on the route). If you select a route expecting 500 deliveries but 300 of them are businesses, you will only reach 200 households on that route. Always check the residential delivery count, not the total delivery count, when planning your EDDM routes.

7. Mailing Without a Proof

Printing 5,000 postcards without reviewing a physical proof is a gamble. Colors can shift between screen and press. Text near the trim edge can get cut off. A single proof copy costs almost nothing compared to reprinting an entire run.

Frequently Asked Questions

What is the minimum size for an EDDM mailpiece?

EDDM mailpieces must qualify as USPS flats, not letters. The piece must exceed at least one of these dimensions: longer than 11.5", taller than 6.125", or thicker than 0.25". In practical terms, the most common minimum EDDM size is 6.5" x 9". A standard 6" x 9" postcard does not qualify because it does not exceed any letter-size threshold.

How much does EDDM postage cost per piece?

EDDM Retail postage is $0.223 per piece as of 2026. This is a flat rate regardless of the size of your mailpiece (as long as it meets EDDM requirements). There are no volume discounts on the per-piece rate, but the rate itself is already the lowest available through USPS. For a full cost analysis including printing, see our EDDM cost breakdown.

Do I need a mailing permit for EDDM?

No, you do not need a mailing permit for EDDM Retail. You pay postage at the post office counter when you drop off your bundles. If you use EDDM BMEU (the commercial version for higher volumes), you will need a USPS mailing permit and a permit imprint.

What is the maximum weight for EDDM?

EDDM mailpieces cannot exceed 3.3 ounces. Standard postcards on 14pt or 16pt card stock are well under this limit. Multi-page self-mailers, catalogs, or pieces with attachments (magnets, coupons, samples) should be weighed before you commit to a full print run.

Can I do EDDM myself or do I need a mail house?

You can absolutely do EDDM Retail yourself. The process involves selecting routes on the USPS EDDM Online Tool, printing your mailpieces to spec, bundling them in groups of 50-100 with facing slips, and dropping them at your local post office. However, for campaigns over 5,000 pieces, campaigns spanning multiple ZIP codes, or if you want to avoid the learning curve of compliance requirements, working with a full-service EDDM provider like Mail Processing Associates is more efficient. We handle design, printing, bundling, documentation, and USPS delivery so you can focus on your business.

If you are considering sending bulk postcards through other methods, EDDM is almost always the most affordable option for local saturation campaigns. The key is ensuring your mailpiece meets every requirement before you print.