What Should Go on the Front vs Back of a Postcard?

The front's job: earn the glance

When a postcard lands in someone's mail pile, the front is what gets seen first, and usually only for a second or two before the recipient decides whether to keep it or set it aside with the rest of the stack. That means the front has to communicate the single most important thing fast, without requiring the reader to flip the card over or read a paragraph to understand why it's relevant to them.

In practice, the front usually needs three things working together: a headline that names the reason this piece is worth a second look, a visual element, whether that's a photo, an illustration, or a personalization detail like the recipient's company name worked into the design, and often a short statement of the core value proposition if there's room. What the front should not try to do is explain everything. A front that's covered in text is asking the recipient to do reading work before they've decided the piece is worth their time, which defeats the purpose of the format.

The back's job: earn the response

Once the front has done its job and the recipient has turned the card over, the back gets a bit more of their attention, which is where the supporting case belongs. That typically includes a short block of context or proof, why this offer, why now, why it's relevant to their business specifically, along with the practical information needed to act: a QR code, a phone number, a web address, and basic contact details for the sender.

The back is also the natural home for a secondary proof point or a short list, something that would have cluttered the front but adds real weight once the recipient is already engaged. A short set of three specifics, a brief line about who the sender works with, or a one-line credential can live here without competing with the headline for attention. The back should still stay disciplined, though. It's supporting material for one idea, not a second postcard's worth of separate pitches.

Where personalization belongs on each side

Personalization elements, the recipient's name, their company name, an industry-specific image or reference, need to be placed based on what job they're doing. A personalization detail that's meant to earn the glance, like the recipient's company name worked into the headline or a relevant image tied to their industry, belongs on the front, since that's what makes the piece feel like it was made for them rather than mass-produced.

Personalization that's meant to build the case, like a specific detail about their company, their role, or a tailored line of supporting copy, fits better on the back, where there's room to say something more specific without crowding the headline. On a smaller format, that split matters even more, since there's less room to work with overall. On a larger format, both sides can carry a bit more personalized detail without feeling cramped, but the same principle holds: front personalization earns attention, back personalization builds the case.

A concrete example: a Signature 6×9 layout

Here's how that split typically looks on a Signature 6" × 9" postcard, which is the format most B2B cold outreach runs in. Front: a headline naming a specific pain point or opportunity relevant to the recipient's industry, the recipient's company name worked into the headline or a subhead, and a single supporting image, either an industry-relevant photo or a personalized graphic. That's it. No paragraph of body copy, no second offer, no fine print.

Back: two to three short lines of supporting context explaining why this is relevant now, a short list of specifics if there's a genuine reason to include one, a QR code sized large enough to scan easily, a phone number as a low-friction alternative, and the sender's name and company in a simple footer. That's enough to give a genuinely interested recipient everything they need to act, without turning the back into a second wall of text.

How format size changes the split

The basic front-and-back logic holds across formats, but how much detail each side can carry changes with the size. On a Small 4.25" × 6" piece, both sides need to stay tight, usually one headline element on the front and one supporting line plus the CTA on the back, since there's not much surface to work with. On a Jumbo 6" × 11" or Extra Large 9" × 12" piece, the back can support a bit more, a slightly longer supporting paragraph, a short numbered list, or a second smaller proof point, but the front should still stay focused on one headline idea. More space on the back is room to make the existing case clearer, not an invitation to add a second competing message.