Postcard Format and Layout Specs for Print
A postcard has two sides and a small space to work in. Here is the full format: standard sizes, the front and back layout, the mailing panel, and the file settings that keep it printing clean.
Postcard format is a two-sided layout: the front carries the image and headline, the back splits between your message and the mailing panel. Start from a standard size like 4x6 or 6x9 in, add 0.125 in bleed, keep text inside the safe margin, reserve the address area per USPS, and set color to CMYK at 300 DPI. 4OVER4.COM prints it and ships from New York.
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Postcard format in one paragraph
Postcard format is the two-sided layout a card follows, plus the edge and file rules that keep it printing clean. The front carries the image and headline, the back splits between your message and the mailing panel. Start from a standard size, add bleed past the trim, keep text inside the safe margin, reserve the address area per USPS, and set color to CMYK at 300 DPI before 4OVER4.COM prints it.
Why format decides whether a postcard works
A postcard has to do a lot in a small space, and it has two sides to do it on. Get the format right and the front grabs attention while the back delivers the message and mails cleanly. Get it wrong and the design gets clipped at the edge, or worse, the card cannot be mailed because the address panel is buried under artwork.
Postcard format is the two-sided layout a card follows: what lives on the front, how the back splits between your message and the mailing panel, and how the edges are set with bleed, trim, and a safe margin. It is the blueprint that keeps a postcard both attractive and functional.
This guide covers the whole layout: standard sizes, the front and back structure, the mailing rules, and the file settings that keep it printing right. If you are ready to order, our postcards come in the standard sizes and stocks with live pricing.
What is postcard format?
At its core, postcard format is a set of layout decisions applied to two sides. The front is your billboard: a strong image and a short, bold headline. The back is split, with room for your body message or offer on one side and, when the card is mailed, a reserved panel for the recipient address and postage.
Wrapping that layout are the fundamentals every printed piece shares. Set the size to a standard postcard dimension. Add bleed past the trim and keep text inside a safe margin. Work in CMYK and place images at 300 DPI. Export a flattened PDF for each side. Those rules stay constant whether the card is a quick handout or a mailed offer.
The format flexes by product. A standard postcard uses the two-sided layout, a folded postcard adds panels for more content, and a direct-mail postcard comes pre-structured for USPS. All start from the same size and edge logic.
Standard postcard sizes
Size is the first format decision, and it ties directly to postage. 4 by 6 in is the classic mailer: economical, efficient to print, and eligible for the lowest postcard postage rate. 5 by 7 in gives a bit more room while still feeling like a card. 6 by 9 in and 6 by 11 in command attention in a crowded mailbox and move into higher postage classes.
Bigger is not automatically better. A larger card stands out but costs more to print and mail, so match the size to the job. A high-volume mailing where budget matters favors 4 by 6, while a premium offer that needs to be noticed justifies a 6 by 9 or larger. If you need more space for content, a folded postcard adds panels without growing the mailed footprint.
Whatever size you choose, build the file to those exact dimensions plus bleed. The postcards category lists every size with live pricing so you can weigh the cost against the impact before you commit.
Front and back layout, with bleed and safe zone
The three edge lines are the heart of any print layout, and postcards are no exception. The trim line is where the blade cuts, at your final size. The bleed is 0.125 in of artwork past that trim on every side, so any color or photo reaching the edge keeps going. The safe margin is 0.125 in inside the trim, where all your text and logos must stay.
Apply those to both sides. On the front, run your image to the bleed and keep the headline inside the safe margin. On the back, divide the space: one side for your message, the other reserved for the mailing panel if the card is mailed. The diagram above shows exactly how the front and back divide up.
Skip the bleed and a slight cutting shift leaves a white sliver along an edge; crowd the safe margin and your text gets clipped. Our dedicated guide on bleed and trim shows how to set these in your design software, and the printing terms page defines each one.
The mailing panel and USPS rules
If your postcard travels through the mail, the mailing panel is non-negotiable. Reserve the lower right area of the back for the recipient address and postage, and keep that zone clear of artwork, borders, and dark backgrounds so the address scans and the card delivers reliably.
USPS sets clear-zone and size requirements that vary by mail class, and getting them right is what separates a card that mails at the postcard rate from one that gets rejected or upcharged. Keep the address in legible dark type on a light background, and leave the barcode area untouched. For neighborhood-wide sends, EDDM has its own size and layout standards.
The simplest way to stay compliant is to start from a format built for mailing. Our direct-mail postcards come pre-structured to USPS requirements, and our EDDM service handles the routes and rules for Every Door Direct Mail campaigns.
Designing the file and ordering
With the layout set, the file settings finish the job. Work in CMYK so your screen preview reflects process ink, and convert any RGB art before export. Place every image at 300 DPI at final size and check it at 100 percent, since a photo that looks fine on screen can go soft once printed. Then flatten and export a press-ready PDF for each side.
You do not have to build it from scratch. A free postcard template gives you the correct size with bleed and safe margins already placed, and the online designer handles the two-sided setup live in your browser.
From there it is stock, finish, and quantity. Use the live specs and pricing panel below to choose your postcard and see the exact options, or order free paper samples first to feel the stock before your run.
Wally lays out both sides before he prints
Front for impact, back for the message and the mail
Wally treats a postcard as two billboards: a bold image and headline on the front, a split back with your message on one side and a clean address panel on the other. He runs art to the bleed, keeps text in the safe zone, reserves the mailing area per USPS, and sets everything to CMYK at 300 DPI. Export a flattened PDF for each side and 4OVER4 prints it ready to mail.
Order postcards →Quick reference
The postcard format spec sheet, at a glance
Every postcard comes down to the same handful of format settings. Match these and your artwork is ready for the press and the mail.
| Setting | Get it to | Why it matters |
|---|---|---|
| Size | 4x6, 5x7, 6x9, 6x11 in | Standard sizes match postage classes and print efficiently. |
| Bleed | 0.125 in past every edge | Art runs past the trim so no white slivers show after cutting. |
| Safe margin | 0.125 in inside the trim | Keeps text and logos clear of the blade. |
| Resolution | 300 DPI at final size | Keeps photos and small type sharp on the printed card. |
| Address panel | Kept clear per USPS | The mailing area must scan cleanly for the card to deliver. |
| File format | Flattened PDF, front and back | A single press-ready PDF for each side prints predictably. |
Step by step
Format a print-ready postcard in 6 steps
- Pick a standard size Start from a common postcard size like 4 by 6 or 6 by 9 in so it matches a postage class and prints efficiently.
- Set up both sides with bleed Build the front and back at the trim size, add 0.125 in of bleed on every edge, and pull margins in 0.125 in for the safe zone.
- Design the front for impact Put the headline image and main message on the front, keeping key text inside the safe margin and running backgrounds to the bleed.
- Split the back and reserve the mailing panel Use one side of the back for your message and keep the address block and postage area clear per USPS if you plan to mail it.
- Work in CMYK at 300 DPI Set color to CMYK, place images at full resolution, and check each at 100 percent so nothing prints soft.
- Proof, export, and order Export a flattened PDF for each side, run it through our free file check, then choose stock, finish, and quantity.
Specs and pricing
Postcard specs and live pricing
Once your format is set, the print choices come down to size, stock, and finish. Here are the live specs and price-per-unit for postcards at 4OVER4.COM, straight from the configurator.
| Quantity | Price Per Unit | Total |
|---|---|---|
| 50 | 33.0¢ | $16.48 |
| 100 | 24.2¢ | $24.16 |
| 200 | 15.9¢ | $31.86 |
| 300 | 12.8¢ | $38.45 |
| 400 | 11.3¢ | $45.04 |
| 500 | 10.3¢ | $51.62 |
| 600 | 9.89¢ | $59.31 |
| 700 | 9.57¢ | $67.00 |
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Common Questions
Common questions about postcard format
What is postcard format?
Postcard format is the two-sided layout that a printed postcard follows: what goes on the front, what goes on the back, and how the edges and mailing area are set up. The front typically carries the main image and headline. The back is split, with one area for your message or offer and, if the card will be mailed, a reserved panel for the address and postage. On top of that layout sit the three edge lines every printed piece needs, bleed, trim, and safe margin, plus the standard size and the CMYK, 300 DPI file settings that keep it printing cleanly.
How do I choose the right postcard format?
Choose by how the postcard will be used and mailed. For a standard mailer, a 4 by 6 in card is economical and qualifies for the lowest postage, while a 6 by 9 or 6 by 11 in card stands out in the mailbox at a higher postage class. If the piece is handed out rather than mailed, you have more freedom in size and can skip the mailing panel. Folded postcards give you extra panels for more content. Match the size and format to your message length, your budget, and whether it travels through the mail, then follow the standard bleed and safe-margin setup.
What does postcard format cost and how are prices set?
Preparing the file yourself costs nothing, and the free file check on every order is included. Printed postcard price scales with size, paper stock, finish, and quantity, where a larger run drops the unit price. Bigger formats and heavier or coated stocks cost more, and mailing services add postage and handling if you use them. You set each option in the configurator and the price updates live, so you can compare a 4 by 6 against a 6 by 9 card, or a standard against a premium stock, before you commit.
What sizes, stocks and finishes are available for postcards?
Postcards come in standard sizes including 4 by 6, 5 by 7, 6 by 9, and 6 by 11 in, plus folded and custom die-cut options. Stocks range from lighter card weights up to thick premium boards, with finishes like matte, gloss, and specialty coatings. Some formats add features like a writable uncoated back for mailing. Each postcard product page lists the exact sizes, stocks, and finishes with live pricing so you can see how each choice affects the cost and the postage class.
How long do postcards take to print and ship?
Turnaround depends on the size, stock, finish, and quantity, and the configurator shows the production time for your exact build before you order. Because 4OVER4 prints and ships from New York, many postcard orders move quickly, and rush options are available on qualifying products. If you use a mailing service, add the mailing timeline. Configure the order to see the estimated production and shipping window alongside the live price.
How do I set up the mailing side of a postcard?
If your postcard will be mailed, reserve the lower right portion of the back for the address block and postage, and keep that area free of artwork, borders, and dark backgrounds so the address scans cleanly. USPS has specific clear-zone requirements that vary by mail class, so follow the guidance for your format, and keep the address in a legible, dark type on a light background. For bulk mailing routes, EDDM has its own size and layout rules. When in doubt, use a direct-mail postcard format that is already built to those standards.
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Configure your postcard at 4OVER4.COM, pick the size, stock, and finish your campaign needs, and print a format that looks sharp and delivers. Watch your price update live.
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Gold Standard guarantees apply to all standard orders placed through 4over4.com. Price match requires verifiable proof of a competitor's published price for an equivalent product with matching specifications and turnaround time. Satisfaction guarantee covers manufacturing defects and print quality issues. Contact support with order number and documentation. On-time delivery rate based on tracked orders 1999 to 2026. Individual results may vary based on shipping carrier performance.
