2026 Rate Comparison by Mail Class

Rates effective as of July 2025. Verify against USPS Notice 123 for the most current pricing.

First-Class retail postcard rates for 2026 are $0.74 per piece, while presorted rates drop to $0.68 at 500+ pieces. Marketing Mail postcards range from approximately $0.37 to $0.43 per piece depending on presort level, with 200-piece or 50-pound minimums. EDDM delivers the lowest rate at $0.247 per piece for saturation campaigns. (Confirm current EDDM Retail rate against Notice 123, as some sources report $0.223 effective January 18, 2026.)

*Marketing Mail rates vary by presort level and entry point. See the First Class vs Marketing Mail comparison for a full automation rate breakdown.

**Verify current EDDM Retail rate against USPS Notice 123.

First-Class presorted delivers in 1 to 5 days, which makes it ideal for event invitations or limited-window promotions where timing is everything. Marketing Mail saves on postage but takes 3 to 10 days, so it’s a great fit for ongoing acquisition campaigns or seasonal offers with flexible timing. EDDM at $0.247 per piece eliminates list acquisition costs entirely, making it a cost-effective choice for local businesses that want to reach every household on a carrier route.

To compare First-Class and Marketing Mail delivery speed and eligibility in depth, review the USPS mail class comparison. For self-mailer postcard formats that require tabbing, see the USPS tabbing requirements guide.

Size-Rate-Classification Reference Table

The standard postcard size for mailing is 4×6 inches, which qualifies for the postcard rate of $0.68 presorted. Here’s a helpful detail many mailers overlook: since 2021, USPS extended postcard classification to include 6×9 cards. That means you get 50% more creative space at the same postcard rate.

Keep in mind that anything larger than 6×9 or thicker than 0.016 inches moves into letter or flat classification with higher postage. The good news is that Marketing Mail rates still stay in the $0.37–$0.43 range for letter-sized pieces up to 6×11 inches. EDDM pricing at $0.247 per piece applies to flat-sized mail (minimum 6.125″ x 10.5″, maximum 12″ x 15″), with popular sizes including 6.25×9 and 8.5×11.

Healthcare appointment reminders and service confirmations perform well on compact 4×6 cards, keeping costs low and messages scannable. Real estate agents and retailers use 6×9 to feature property photos or product grids without increasing postage. Automotive dealerships and large-format campaigns choose 6×11 or 8.5×11 when visual impact justifies the letter or flat rate.

Select the Ideal Postcard Size for Your Campaign Goals

A 6×9 card gives you 50% more creative area than a 4×6, which means more room for multiple images, detailed offers, and clear calls to action without feeling cramped. Industry data suggests larger postcards can meaningfully lift response rates compared to smaller formats. Why? Because recipients tend to spend more time with oversized mail that stands out in the mailbox. Since both sizes qualify for the same postcard rate ($0.68 presorted), choosing 6×9 is a smart way to increase visibility and response without affecting your postage costs.

When your offer requires more space, a 6×11 card at the letter rate ($0.78 First-Class presorted) or Marketing Mail rate (approximately $0.37–$0.43) may deliver better ROI than a crowded 6×9 design. Here’s a useful way to think about it: focus on cost per response instead of cost per piece. If a $0.78 6×11 card lifts response by 40% compared to a $0.68 6×9, the larger format actually reduces your cost per acquisition, even though postage increases.

EDDM at $0.247 per piece eliminates list acquisition costs entirely, which makes saturation campaigns cost-effective even when response rates run lower than targeted mailings. EDDM postcard sizes start at 6.125×10.5 inches, larger than standard postcards, so you actually gain creative space while paying the lowest rate available. EDDM works especially well for local businesses targeting neighborhoods within defined carrier routes, think restaurants promoting grand openings or dental practices announcing new patient offers.

Meet USPS Postcard Requirements and Physical Specifications

Let’s break down the specs you need to know. Postcards must measure at least 3.5 inches high, 5 inches long, and 0.007 inches thick. Maximum dimensions for the postcard rate are 6 inches high, 9 inches long, and 0.016 inches thick. Postcards larger than 4.25×6 inches require minimum 0.009-inch thickness to prevent jamming in automated sorting equipment.

The aspect ratio must fall between 1.3 and 2.5, which you calculate by dividing the length by the height. For example, a 6×9 card yields an aspect ratio of 1.5 (9 ÷ 6), well within range. A 6×6 square card, on the other hand, yields 1.0, which doesn’t meet the requirement and triggers non-machinable surcharges. Also, corners must be square, not rounded. USPS automation equipment relies on sharp edges for proper alignment and barcode scanning.

Standard 14-point cardstock measures approximately 0.014 inches thick and meets USPS requirements for all postcard sizes. If you’d like a more premium feel, 16-point cardstock (0.016 inches) reaches the maximum thickness allowed and provides better durability during mail processing. Just keep in mind that anything thicker than 0.016 inches moves into letter classification with higher postage.

Mailing.com uses On-Site USPS Verification to catch specification issues before production begins, preventing costly reprints and delays.

Optimize Design Specifications for Production and Deliverability

A few design details can make the difference between a smooth production run and costly delays. Start with 14-point cardstock minimum for durability and automated processing compatibility. Include 0.125-inch bleed on all sides when using full-coverage backgrounds or edge-to-edge images, since slight trimming variations during production may otherwise leave unprinted edges.

Be sure to reserve the right half of the address side for the delivery address, return address, and postage. USPS automation equipment scans this zone for address information and barcodes, so any overlapping graphics, text, or logos in this area can trigger processing delays and potential non-delivery. Maintain a barcode clear zone measuring 4.75 inches wide by 0.625 inches high in the bottom right corner of the address side.

For address text, use high-contrast colors like black or dark blue on white or light backgrounds. It’s best to avoid reverse type (white text on dark backgrounds) in address panels, because scanners can struggle with low contrast. Mailing.com provides precision printing with tight quality control across high-volume runs, ensuring color consistency, registration accuracy, and barcode readability on every piece.

Lower Acquisition Costs with EDDM Postcard Sizes

If you’re looking for the most budget-friendly way to reach a large local audience, EDDM is worth a close look. It delivers $0.247 per piece postage (verify against current Notice 123) while eliminating list rental fees, data append costs, and address validation expenses. You simply select carrier routes through the USPS mapping tool, and every household on those routes receives your postcard.

To qualify, your EDDM pieces must meet flat-sized mail requirements: minimum 6.125 inches high by 10.5 inches long, maximum 12 inches high by 15 inches long, with a maximum weight of 3.3 ounces. They also need to exceed at least one of these thresholds: longer than 11.5 inches, taller than 6.125 inches, or thicker than 0.25 inches. The most popular EDDM postcard sizes are 6.25×9 inches and 8.5×11 inches, which balance creative space with production costs while maintaining the lowest available rate.

The USPS EDDM guide covers carrier route selection, online ordering, and bundling requirements. Combining EDDM saturation with targeted Variable Data Printing (VDP) campaigns allows businesses to layer broad awareness with personalized follow-up, maximizing response across acquisition and nurture stages.

Match Postcard Size to Your Industry and Campaign Goals

• Healthcare providers use 4×6 postcards for appointment reminders, vaccination notifications, and follow-up care instructions. Compact size keeps postage low while delivering essential information clearly. First-Class delivery at $0.68 presorted ensures messages arrive within 1 to 5 days.
• Real estate agents choose 6×9 postcards to showcase property photos, listing details, and market updates. Larger format highlights curb appeal and interior features without increasing postage, because 6×9 qualifies for the same postcard rate as 4×6. Marketing Mail at approximately $0.37–$0.43 per piece works well for just-listed announcements and market reports.
• Automotive dealerships select 6×11 postcards for service coupons, maintenance schedules, and multi-vehicle offers. Letter-sized format provides space for detailed charts, multiple redemption codes, and large-format calls to action. Marketing Mail at approximately $0.37–$0.43 per piece keeps costs low for ongoing service reminders and seasonal promotions.
• Retail businesses use 6×9 postcards or EDDM sizes for coupon distribution, event invitations, and new product launches. EDDM at $0.247 per piece saturates local neighborhoods without list costs, ideal for grand openings or location-specific promotions.

Calculate Direct Mail Postcard Cost by Volume and Class

Looking at total costs at realistic volumes helps you spot optimization opportunities and understand when higher postage actually delivers better ROI through faster delivery or a larger format. The examples below are estimates for planning purposes. Your actual costs will depend on presort level, entry point, and current USPS rates.

• 1,000 6×9 postcards: Marketing Mail costs approximately $370–$430 in postage depending on presort level. First-Class presorted costs $680 at $0.68 per piece, adding $250–$310 but delivering 7 to 9 days faster. For time-sensitive offers where every day matters, the premium may actually improve cost per response by ensuring your message arrives while the offer is still relevant.
• 5,000 EDDM flats: Total postage costs approximately $1,235 at $0.247 per piece (verify current EDDM rate), with no list acquisition or data append expenses. Compared to First-Class presorted at $0.68 per piece, EDDM saves approximately $2,165 in postage alone. List rental typically adds $50 to $100 per thousand names, so EDDM saves an additional $250 to $500 on a 5,000-piece campaign.

Here’s a simple formula to keep in mind: calculate cost per response by dividing total campaign cost (postage, printing, data, and creative) by expected response count. For example, if you assume a 2% response rate, a campaign costing $5,000 on 10,000 pieces yields 200 responses at $25 per response. Now, if increasing size or mail class lifts response to 2.5%, your cost per response drops to $20, even if total campaign cost rises to $6,000.

Request A Quote from Mailing.com to compare costs across sizes, mail classes, and volume tiers for your specific campaign.

Get Answers to Your Postcard Mailing Questions

We hear these questions often, so we’ve gathered the most common ones about USPS postcard dimensions, rates, and compliance requirements for 2026 campaigns.

What is the standard postcard size for mailing?

The most common standard size is 4×6 inches, but 6×9 inches is the largest that still qualifies for the postcard rate. Both mail at the same presorted rate of $0.68, so choosing 6×9 increases visibility and creative space without increasing postage.

What is the 6×9 postcard postage rate for 2026?

Great news: 6×9 postcards qualify for the same postcard rate as 4×6 cards, $0.68 presorted First-Class or approximately $0.37–$0.43 Marketing Mail depending on presort level. You get 50% more creative area without paying more in postage.

What are the thickness requirements for postcards?

Postcards need to be between 0.007 and 0.016 inches thick. If your piece is larger than 4.25×6 inches (including 6×9 cards), the minimum thickness increases to 0.009 inches. Most 14-point cardstock meets this requirement easily, and 16-point cardstock reaches the maximum thickness allowed.

How do I qualify for Marketing Mail rates?

You’ll need a minimum of 200 pieces or 50 pounds, presorted by ZIP code. Delivery takes 3 to 10 days compared to First-Class’s 1 to 5 days. See the quick guide to USPS mail classes for full eligibility and sortation requirements.

Can I use rounded corners on postcards?

Unfortunately, no. USPS requires square corners for automated processing. Rounded corners trigger non-machinable surcharges because the sorting equipment relies on sharp edges for proper alignment and barcode scanning. Verify the current surcharge amount against USPS Notice 123.

What is the cheapest way to mail postcards in bulk?

EDDM (Every Door Direct Mail) offers the lowest per-piece postage at $0.247, and the best part is you don’t need a mailing list. For targeted campaigns, Marketing Mail with Automation 5-Digit presort offers the best rates, starting from approximately $0.37 per piece at 200+ pieces. Mailing.com handles presort optimization to make sure you qualify for the deepest available discounts.

What size postcard gets the best response rate?

Industry data suggests that 6×9 postcards offer the best balance of response lift and cost efficiency, since they give you 50% more creative space than 4×6 while mailing at the same postcard rate. For campaigns that need maximum visual impact, 6×11 postcards at letter rates can drive higher engagement. Just remember to calculate cost per response rather than cost per piece to get a true picture of your ROI.