USPS EDDM Size Guidelines (2026 Guide)
Overview of EDDM Size Guidelines
Choosing the right size for your EDDM (Every Door Direct Mail) campaign is critical for both performance and cost.
At MailPros USA, we simplify USPS EDDM size requirements so you can design, print, and mail with confidence. Your mail piece's size, weight, and thickness determine whether it qualifies for EDDM USPS rates, so understanding these EDDM size guidelines is essential before launching your campaign.
The United States Postal Service's Domestic Mail Manual is over 1,300 pages long and isn't necessarily an enjoyable read. Following these notes regarding EDDM size guidelines will make sure you're not caught by surprise at the post office.
USPS EDDM Requirements (Retail)
To qualify for EDDM mailing, your mail piece must meet the following standards:
Size Requirements
- Minimum: Larger than 6.125" height OR 10.5" length
- Maximum: No side larger than 15" x 12"
Weight
- Must be under 3.03 oz
Thickness
- Between 0.007" and 0.75"
Mail pieces that do not meet these EDDM size requirements will not qualify for discounted EDDM USPS pricing.
You can bypass the minimum size requirement if your mail piece is thicker than 0.25". This allows you to send product samples, promotional kits, and high-impact dimensional mailers. A direct mailer could potentially bulk mail floor samples or blocks of gold to everyone on a carrier route!
15" Width and
12" Height
11.5" Width OR
6.125" Height
Most Popular EDDM Postcard Sizes
The most commonly used EDDM postcard sizes include:
- Standard: 6.25" x 9" (budget-friendly)
- Large: 6.25" x 11" (balanced performance)
- Jumbo: 8.5" x 11" (high visibility)
- Oversized: 12" x 15" (maximum impact)
Size Doesn't Matter for EDDM Retail Rates
| Popular EDDM Sizes | Surface Area | Postage per 1,000 | Postage Per Inch |
|---|---|---|---|
| Standard: 6.25" x 9" | 56.25" | $180 | $3.20 |
| Large: 6.25" x 11" | 68.75" | $180 | $2.62 |
| Jumbo: 8.5" x 11" | 93.5" | $180 | $1.93 |
| Oversized: 12" x 15" | 180" | $180 | $1.00 |
*Rates based on 2026 EDDM Retail Rates for 1,000 pieces
Key Insight: Postage cost remains the SAME regardless of size in EDDM USPS. Bigger postcards = better visibility + higher response rates. Postage can account for over 80% of total campaign cost, so spending an extra penny on a larger sized postcard is a great way to increase your campaign's performance, boost your response rate, and lower your cost per conversion.
Largest Allowed EDDM Mail Size
The largest mail piece allowed in Every Door Direct Mail (EDDM) is:
12" x 15" (Oversized Postcard)
Benefits include:
- Maximum mailbox visibility
- Strong brand impact
- Best cost per square inch
Can You Fold EDDM Mailers?
Yes, folded mailers are allowed in EDDM USPS. Direct mailers can fold brochures in order to meet the size requirements for Every Door Direct Mail.
Common formats include:
- 8.5" x 11" folded
- 11" x 17" brochures
Requirements:
- Must remain under 3.03 oz
- Must meet all EDDM size guidelines
Choosing the Right EDDM Strategy
Depending on your marketing goals:
- Local saturation - Use EDDM routes
- Targeted campaigns - Use mailing lists
- Full-service campaigns - Done-for-you EDDM
Final Thoughts on EDDM Size Requirements
To succeed with EDDM USPS campaigns, remember:
- Follow all USPS EDDM size requirements
- Use larger postcard sizes for better ROI
- Keep weight under 3.03 oz
- Use folded mailers when needed
- Combine size with the right targeting strategy
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