How Much Text Should Be on a B2B Postcard?

The glance test

Most B2B mail gets a first pass that lasts a couple of seconds, sometimes less. In that window, the recipient isn't reading, they're scanning: is this addressed to me specifically, does the headline suggest something relevant, is there an obvious next step. If the answer to those questions isn't clear at a glance, the postcard doesn't get a second look, no matter how good the supporting copy underneath the headline turns out to be.

That's the standard to design against. Every element on the piece should be judged by whether it helps someone pass the glance test faster, not by whether it adds useful information. A postcard can be factually accurate and persuasive and still fail if the layout makes the recipient work to find the point.

Headline-first hierarchy

The headline is doing almost all of the work. It should say, in one line, why this piece is relevant to this specific recipient, not a generic value proposition that could sit on anyone's postcard. Everything else on the card is subordinate to it: supporting copy explains or reinforces the headline, it doesn't introduce a second competing idea. If a postcard needs two headlines to say what it's trying to say, that's usually a sign the offer itself needs to be narrowed before the copy gets written.

Visual hierarchy should make this order unmistakable even to someone not reading closely: headline largest and first, a short supporting line or two beneath it, then the call to action clearly set apart from both. If someone can only read one thing on the card, it should be the headline. If they read two, the second should be the call to action.

How much supporting copy is reasonable

Supporting copy should be a short line of context or a small handful of bullets, not paragraphs. A single sentence that clarifies what the headline means for this recipient, or three or four short bullets that make a quick, concrete case, both work. What doesn't work is copy that tries to pre-empt every possible objection or explain the full offer in detail. That level of depth belongs on the landing page, in the follow-up email, or in the sales conversation the postcard is meant to start, not on the card itself.

A useful check while editing: if a line of copy could be cut without changing whether the recipient understands the offer and the next step, cut it. Supporting copy earns its place by making the headline land better, not by adding more information for its own sake.

Leaving room for personalization

Personalization elements, the recipient's name, their company, a relevant image or detail specific to their situation, need actual visual space to register. When a layout is packed edge to edge with body copy, personalization gets squeezed into a small corner and reads as an afterthought instead of the thing that makes the piece feel individually relevant. Personalization works best when it has room to be the first thing someone notices, not one more detail competing with dense paragraphs.

Text density by format

How much text is reasonable shifts a bit across Yotru's four formats, though the glance-test principle holds for all of them. Small, at 4.25" × 6", has the least room and needs the most discipline: a headline, one short supporting line, and a call to action is close to the ceiling before the piece starts feeling cluttered. Signature, at 6" × 9", is the comfortable middle ground, enough space for a headline, a couple of short supporting points or a small set of bullets, and a personalization element that doesn't feel cramped. Jumbo, at 6" × 11", can carry a bit more, a secondary message or a slightly longer supporting section, without losing clarity. Extra Large, at 9" × 12", can support noticeably more copy and a more layered layout, closer to a small print piece, but the same rule applies even there: more available space is an opportunity for better hierarchy and more generous personalization, not a license to add more competing messages.

Before and after: tightening a wordy postcard

Here's a realistic example. A first draft for a mid-size accounting firm's postcard might read something like: a headline announcing "Comprehensive Tax and Advisory Services for Growing Businesses," followed by a paragraph describing the firm's founding, its range of services from bookkeeping to audit support to strategic advisory, a list of industries served, a line about client satisfaction, and finally, in small type at the bottom, a phone number as the call to action. Everything in that draft might be true and relevant to the business, but a recipient scanning it for two seconds has no clear idea what the postcard actually wants them to do.

A tightened version keeps one idea: a headline naming something specific and current, like "Your Q3 filing deadline is closer than it looks," a single supporting line acknowledging the recipient's business by name or industry and what the firm can help with around that specific moment, and one clear call to action, a QR code leading to a short consultation booking page, set apart visually so it's the last thing the eye lands on. The service list, the firm history and the credentials move to the landing page, where someone who's already interested can read them in full. The postcard's only job is to earn that click, not to make the entire case by itself.