USPS Postcard Template: Sizes, Bleed and Safe Zones

A USPS postcard template is a print-ready layout built at an exact trim size, with 0.125 inch of bleed on every edge, a safe zone that keeps live copy away from the cut, and a reserved mailing panel for the address block, indicia and barcode. The size you pick does more than shape the design. It decides which postage rate the finished piece qualifies for, and that single decision moves the cost of a 10,000-piece drop by thousands of dollars.

Mail Processing Associates prints and mails postcards from our Lakeland, Florida facility, and we set the template to the trim size and mailing panel each job actually needs. This guide gives you the dimensions, thicknesses and clear zones USPS enforces, so your file is right the first time.

USPS Postcard Template Sizes at a Glance

Every postcard falls into one of three postal categories: card, letter or flat. The category is set by the physical piece, not by what you call it. A "postcard" at 6 by 9 inches is a letter as far as USPS is concerned, and it is priced that way.

Template trim size	Mails as	Minimum thickness	Aspect ratio	Typical use	Download
4 x 6 in	First-Class Mail card	0.007 in	1.50	Classic postcard size at card pricing	4x6 template
5 x 7 in	Letter	0.009 in	1.40	Invitation and announcement formats	5x7 template
6 x 9 in	Letter	0.009 in	1.50	The most requested oversized postcard	6x9 template
6 x 11 in	Letter	0.009 in	1.83	Maximum space at letter pricing	6x11 template
6.25 x 9 in	Flat (EDDM standard)	0.009 in	Not applicable	Saturation routes, no mailing list	EDDM 6.25x9 template
6.25 x 11 in	Flat (EDDM jumbo)	0.009 in	Not applicable	Largest EDDM format we run	EDDM 6.25x11 template

Every size in that table has a free print-ready template you can download above, built at trim with bleed, safe-zone and mailing-panel guides already marked. If you would rather grab all of them at once, take the full template pack. For the #10 envelope, 8.5 x 11 trifold letter and 8.5 x 11 EDDM templates, see the full direct mail design template library.

Card pricing ends at 4.25 inches high by 6 inches long, so the 4 x 6 template is the only one in that table that stays inside it. The second line falls at 6.125 inches high, where letter pricing ends and flat pricing begins. Those two lines are the entire economics of postcard format selection.

Not sure which size fits your budget and message? Request a custom quote and we will price two or three formats side by side before you design anything.

The Size Rule That Decides Your Postage

USPS publishes the physical standards in the Domestic Mail Manual. The numbers below come straight from DMM 201, Physical Standards for Letters and Cards, and they did not change with the July 2026 price revision.

Card-Rate Postcards: 3.5 x 5 to 4.25 x 6

To claim First-Class Mail card prices, the piece must be rectangular and fall inside a narrow window. It must be at least 3.5 inches high and 5 inches long, and no more than 4.25 inches high and 6 inches long. Thickness must run between 0.007 and 0.016 inch.

Miss any one of those by a sixteenth of an inch and the piece is no longer a card. There is no rounding and no discretion at the acceptance counter.

First-Class Mail Presort Postcard Mixed pricing is $0.495 per piece. That is the rate a permit holder earns on a presorted list, and it is the number most postcard budgets should be built on.

Without a permit you are buying stamps at the counter instead, and the gap is wide. A retail single-piece First-Class postcard stamp costs $0.65.

Oversized Postcards: Up to 6.125 x 11.5, Priced as Letters

Anything larger than 4.25 by 6 inches is an oversized postcard, and it mails at letter rates. The ceiling is 6.125 inches high by 11.5 inches long by 0.25 inch thick.

There is one specification designers miss constantly. A piece more than 4.25 inches high or 6 inches long must be at least 0.009 inch thick, not the 0.007 inch minimum that applies to smaller cards. A 6 by 9 card printed on light text stock can fail this test and get rejected or surcharged.

For most promotional mail, Marketing Mail is the right class at this size. Marketing Mail Letter Presort Mixed pricing is $0.467 per piece.

When the mail is dated, step up to First-Class. First-Class Mail Presort Letter Mixed pricing is $0.707 per piece. That premium buys faster delivery, and it includes forwarding and return of undeliverable pieces, which Marketing Mail provides only when you add an ancillary service endorsement and pay the associated fee.

Qualifying nonprofits mail the same oversized postcard for far less. Nonprofit Marketing Mail letter Mixed pricing is $0.257 per piece.

Prices above are per USPS Notice 123 effective July 12, 2026. The tier you actually earn depends on how densely your list sorts, which is a data question rather than a design question. Our full rate breakdown lives on the 2026 USPS postage rates page.

Above Letter Size: Flats and EDDM Formats

Cross 6.125 inches high or 11.5 inches long and the piece becomes a flat. Flats cost meaningfully more per piece in most classes, so the size is worth choosing deliberately rather than by accident.

The exception is saturation mail. EDDM pieces run at flat dimensions on purpose, because EDDM prices by route rather than by list. Our two standard EDDM formats are 6.25 by 9 inches and 6.25 by 11 inches. EDDM BMEU postage is $0.259 per piece, and EDDM Retail postage is $0.260 per piece.

That is why a 6.25 by 9 EDDM card can beat a 6 by 9 letter-rate card on postage despite being physically larger. You are buying a different product, not a bigger stamp. Our EDDM services page walks through when saturation beats a targeted list.

What Each Format Costs on a 10,000-Piece Drop

Format debates get settled fastest with the postage math in front of you. The table below multiplies the Mixed-tier rate by 10,000 pieces. Postage only, no printing or list costs.

Read the first two rows together. A 4.25 by 6 card on First-Class Mail Presort Postcard Mixed runs $0.495 per piece. A 6 by 9 card on Marketing Mail Letter Presort Mixed runs $0.467 per piece. The larger piece more than doubles the design area and still costs $280 less on 10,000 pieces, because that saving comes from the change of mail class, not from the change of size.

The third row is the cost of speed. First-Class service on that same 6 by 9 card adds $2,400 per 10,000 over Marketing Mail, which buys faster delivery plus forwarding and return of undeliverable pieces. That is a real service difference, not a surcharge, so choose it when the mail is dated.

How to Build the Template File

Once the trim size is settled, the file itself follows a short set of rules. These are the same specs we send customers who ask for a USPS postcard template before they start designing.

Trim, Bleed and Safe Zone

Build the document at the exact finished trim size. Extend every background, photo and color field 0.125 inch past all four edges. That overhang is the bleed, and it exists because paper shifts a hair during cutting.

Then pull all live copy, logos and anything you cannot afford to lose at least 0.125 inch inside the trim. A 0.25 inch safe margin is more comfortable on heavier stocks. Text sitting right against the trim line is the single most common reason we send a file back.

The three boundaries stack like this on a 6 by 9 card, with the address side carrying the reserved postal areas.

Thickness and Paper Weight

Thickness is a postal requirement, not a preference. Card-rate postcards need 0.007 inch minimum, and oversized postcards need 0.009 inch minimum.

In practical terms, a 14 point or heavier card stock clears the oversized minimum comfortably. Lighter cover weights can measure under 0.009 inch once coated and calipered, which is why we check the actual caliper on the specific stock rather than trusting the weight on the spec sheet.

Aspect Ratio and Machinability

For letter-size mail, USPS requires the aspect ratio, meaning length divided by height, to fall between 1.3 and 2.5 inclusive. A 6 by 9 card sits at 1.50 and a 6 by 11 card at 1.83, so both are comfortably inside the window.

Design a square-ish piece and you fall below 1.3. The mail then becomes nonmachinable. On First-Class Mail letters that carries a $0.49 per piece nonmachinable surcharge, and on Marketing Mail it moves the piece onto separate nonmachinable pricing. Either way the penalty erases the creative gain instantly.

Setting Up Both Sides

Build the file as two pages at the same trim size, front first and address side second. Keep the two pages in the same document and the same color space so nothing shifts between them.

The address side is the one that carries the mailing panel, so it gets the design constraints. Give the front the photography and the headline, and treat the back as a working surface with a message block on the left and the postal area on the right.

When the Design Is Already Built at the Wrong Size

Files arrive at the wrong trim size often, usually because a design tool defaulted to a 4 by 6 or a 5 by 7 preset. The fix depends on how far off the proportions are.

If the artwork is the right shape but slightly small, we can scale it to trim and add the missing bleed without visible quality loss, provided the source resolution has room. If the proportions are wrong, scaling distorts the design, so the better path is rebuilding the canvas at the correct size and repositioning the elements into it.

Send the file before you rebuild it. We will tell you which of those two paths applies, and in many cases we can correct the geometry on our end rather than sending you back to the drawing board.

The Mailing Panel: What USPS Needs Reserved

The mailing panel is the part of the template most design tools ignore, and it is the part that gets mail rejected. Reserve it before you lay out anything else.

Address Block Placement

Plan for a clear rectangle roughly 4 inches wide by 2 inches tall on the address side. The address block sits inside it, along with any endorsement lines your mail class requires.

Keep the area free of background art, screens and dark colors. Address blocks are read by machine, and contrast beats decoration every time.

Barcode Clear Zone

Leave the lower right corner of the address side clean. On letter-size mail the clear zone runs 4.75 inches in from the right edge and 0.625 inch up from the bottom edge, and artwork crossing into it rules that corner out as a barcode location.

USPS accepts the Intelligent Mail barcode in either of two places. It can sit in that clear zone, or inside the address block itself, which is the arrangement we prefer because it keeps the lower edge of the design free. Either way the space has to be planned rather than recovered later, and a piece that leaves neither area clear loses its automation discount.

Indicia and Permit Placement

The postage indicia sits in the upper right corner of the address side. It carries the mail class and permit information, and it must not be overprinted by artwork.

For customers mailing under our permit, we place the indicia and set the endorsement lines during production. That step happens in-house at MPA, so the artwork you approve is the artwork that mails.

Template Mistakes That Trigger a Reprint

A handful of errors account for most of the files we return. Each one is cheap to fix in the template and expensive to fix after press.

Copy running to the trim edge is first. Without a safe margin, a normal cutting variance clips headlines and phone numbers on part of the run.

Missing bleed is second. A file built flat to trim size leaves a white sliver on any piece that shifts during cutting, and there is no way to add the missing image data later.

Art covering the mailing panel is third. It looks fine on screen, then the address and barcode print over a photograph and the mail fails to scan.

The fourth is stock that measures under 0.009 inch on an oversized piece. That one passes every design check and fails at the postal counter, which is the worst possible time to find it.

When Saturation Beats a Targeted List

Everything above assumes you are mailing to a list. When the target is a neighborhood rather than named households, the arithmetic changes.

A 6.25 by 11 EDDM piece gives you the largest canvas we print for routine mail while EDDM BMEU postage stays at $0.259 per piece, and it needs no list at all. The trade is precision: you reach every active address on the route, including the ones outside your customer profile. You can map candidate routes yourself with our EDDM route planner before committing to a format.

In 35+ years of running mail from a single Lakeland facility for more than 700 business customers across all 50 states, the format that wins is rarely the biggest one on screen. It is the one whose postal class matches what the campaign is actually trying to do.

Template Checklist Before Files Go to Press

Run this list before you send artwork. It catches almost everything we see fail.

• Document built at exact trim size, with 0.125 inch bleed on all four edges
• Live copy pulled 0.125 to 0.25 inch inside the trim on every side
• Mailing panel reserved, roughly 4 by 2 inches, with the lower right corner clear
• Indicia area open in the upper right of the address side
• Stock calipers at or above 0.009 inch for any piece over 4.25 by 6
• Aspect ratio between 1.3 and 2.5 for letter-size pieces
• Images at 300 dpi at final size, CMYK, with no RGB or spot leftovers
• Fonts embedded or outlined, and one print-ready PDF containing both sides in order, front page first

You can run your own file through our free file check tool to confirm resolution, color space and page geometry before you send it.

Get the Template Right Before You Print

Send us the size and the mail class you are aiming for and we will send back a template built to that spec, with the mailing panel already positioned. We print, address, sort and induct the mail under our own USPS permit, so nothing changes hands between design approval and the mail stream. That single-vendor path is the same one behind our broader print and mail services.

Request a custom quote or call 863-687-6945. You can also browse formats, stocks and coatings on our postcard printing page.