Postcard Marketing 101: What to Put on the Front and Back

You have an offer, a mailing list and a budget for postcards. Then you open a blank canvas and the questions start. What goes on the front? How much text fits on the back? Where does the address go, and what must stay empty so the post office can process it? Get these wrong and your postcard gets ignored on the way to the recycling bin, or runs into trouble before it is delivered.

This guide breaks a marketing postcard into its two jobs. The front has to stop someone for a few seconds. The back has to turn that attention into a call, a visit or a scan, while still following the postal rules. Here is how to plan both sides.

The front: your three-second billboard

Most people sort mail standing over a counter or a trash can. Your front side is competing with bills, catalogs and other postcards, so treat it like a billboard, not a brochure. A strong front usually has only three things:

• One dominant image. A real photo of your work, your food, your team or the home you just listed beats generic stock photography.
• One headline that names the benefit. "Your AC, fixed today" or "Fresh pizza, 10 minutes from your door" says more than your company name alone. Aim for a headline someone can read in one glance.
• A visual cue to flip it over. A short line like "Your offer is on the back" or a bold price tag in the corner gives the reader a reason to turn the card.

Leave off the front: paragraphs, long service lists and more than one offer.

Front design tips that hold up in print

• Use large type. If the headline is not readable from arm's length on your screen at 100% zoom, it is too small.
• Keep strong contrast between text and background. Light text on a busy photo is a common reason a postcard headline disappears.
• Extend background images past the trim line (bleed) and keep text inside the safe zone. Our print-ready file checklist explains bleed, resolution and CMYK in detail.

The back: where the sale actually happens

The back of a mailed postcard is split into two zones: your message area and the mailing area. Plan the mailing area first, because it is not negotiable, then design your message around it.

The mailing area (right side)

On a standard horizontal postcard, the right half of the back holds the postage indicia or stamp in the top-right corner, your return address in the top-left of that area, and the recipient's address block. A few USPS rules to design around:

• Keep the barcode clear zone empty. For letter-size pieces, which include postcards, USPS defines a barcode clear zone that runs 4-3/4 inches in from the right edge and 5/8 inch up from the bottom edge (USPS DMM 202). Nothing should be printed there: no photos, no background color, no fine print.
• Keep the address area light and plain. USPS recommends black ink on white or light paper, simple fonts, at least 10-point type, and no reverse type (white text on a dark background) for addresses (USPS Delivery Address guidelines).
• Nothing below the city, state and ZIP line. Mail sorting machines read the address from the bottom up, so a slogan or logo under the address can confuse them.
• Address and postage go on the same side. That side is the back of your postcard, not the front.

Even when a full-service mailing product handles addressing and postage, leave that space open. Ask for a template before you start.

The message area (left side)

This is your sales space. Structure it in this order:

1. Restate the offer clearly. "15% off your first cleaning" or "Free estimate this month." Be specific about what they get.
2. Two to four reasons to trust you. Short bullets work best: licensed and insured, family owned, years in business, neighborhoods you serve. Only list things that are true and that you can back up.
3. A deadline. An expiration date gives people a reason to act now instead of "someday."
4. One clear call to action. Call, scan or visit. Pick the main one and make it the biggest element in this area.
5. Contact details. Phone number, website and, if relevant, your physical address and hours.

Adding a QR code the right way

A QR code is a natural fit for the back of a postcard, but only if it is easy to use:

• Link to a page about the offer on the card, not your homepage.
• Print it large enough to scan comfortably and test it from a printed proof with more than one phone.
• Add a short label such as "Scan to book" so people know what happens next.

Choosing a size and stock

Size affects both visibility and postage. To mail at the First-Class Mail postcard price, USPS says a piece must be rectangular, at least 3-1/2 x 5 inches and 0.007 inch thick, and no more than 4-1/4 x 6 inches and 0.016 inch thick (USPS postcard sizes). Larger cards, like 6x9 or 6x11, are mailed at letter prices but give you much more room and tend to stand out in the stack.

Stock matters too. A thin card feels flimsy and can get damaged in mail processing equipment, which USPS also warns about. Heavier card stocks like 14pt Postcards or 16PT Postcards feel more substantial in the hand. If you are unsure what the point numbers mean, our paper stock guide explains it.

Front vs. back: quick comparison

Postcard checklist before you print

• The front has one image, one headline and a reason to flip the card.
• The offer is specific and has an expiration date.
• There is only one main call to action.
• The mailing area is blank, light and follows the template, including the barcode clear zone.
• The QR code (if any) links to a specific page and was tested on a printed proof.
• Phone number and website are spelled correctly and easy to find.
• The size and thickness match the postage rate you planned for.
• You have a way to track responses: a promo code, a unique URL or a dedicated phone number.

Sending to a list or a whole neighborhood

There are two common ways to get postcards into mailboxes. If you have a customer or prospect list, Direct Mail Postcards let you upload your list and have the cards mailed for you. If you want to reach every household on specific postal routes without a list, Every Door Direct Mail is the usual route; EDDM Postcards Print Only covers the printing if you plan to handle the drop-off yourself. Our direct mail guide for Central Florida compares both approaches.

Want people to keep part of the card? Tearoff Postcards add a perforated strip that works as a coupon or appointment card.

Frequently asked questions

Should the offer go on the front or the back of a postcard?

Both, in different ways. Tease the offer on the front with a short headline or price callout so people flip the card, then spell out the details, conditions and expiration date on the back next to your call to action.

How much text should a marketing postcard have?

Less than you think. A few words on the front and a short offer, a handful of bullets and contact details on the back are usually enough. If you need paragraphs, consider a brochure or a landing page linked by a QR code.

Can I print images or color behind the address?

Keep the address area and the barcode clear zone plain. USPS recommends dark text on a white or light background for addresses and no printing in the barcode clear zone at the bottom right of the piece. Use a template from your printer to stay inside the rules.

Print your postcards with KEOPSY

At KEOPSY, you can choose size, stock, finish and quantity in the live configurator. 16PT Postcards start at $20.81 as listed on keopsy.com, and you see your exact price before you order. Every file is reviewed by a real person before it prints, so a missing bleed, a low-resolution photo or artwork sitting in the mailing area gets flagged before it becomes a costly reprint.

No design yet? Use the KEOPSY AI Design Studio to build the front and back of your postcard, then send it straight to print.