Latest / The Copywriting Podcast with Fexingo: Sales Letters, Headlines, and Persuasive Writing / How a Blank Space Boosted Response by 47 Percent
Transcript
- Lucas: I was digging through a stack of old direct mail swipe files the other day — the physical kind, from the early nineties — and one envelope stopped me cold. Luna: What was on it? Lucas: Almost nothing. A return address in the corner, a first-class stamp, and a teaser line so faint you had to tilt the envelope to read it. Inside, the letter had enormous margins — like two inches on each side — and three-quarters of the page was empty. Luna: Wait — a sales letter with mostly blank space? That feels like the opposite of everything we hear about packing value into every inch. Lucas: Exactly. And that's why it worked. The letter was from a financial newsletter publisher — I won't name the firm, because the test data is what matters. They split their subscriber list. One group got the standard dense letter — single-spaced, narrow margins, lots of underlining and bold. The other got the sparse version: wide margins, double-spaced between paragraphs, short paragraphs of two to three sentences. Luna: And the sparse version won by how much? Lucas: Forty-seven percent higher response. That's not a rounding error. That's nearly half again as many people pulling out a checkbook. Luna: Forty-seven percent. I mean, we've talked about small headline tweaks moving the needle by thirty, forty percent. But this was just... less copy? Lucas: Less copy on the page, yes, but the same message. The publisher didn't cut words — they spread them out. The dense version had about eight hundred words on a single page. The sparse version had the same eight hundred words across four pages, with big margins and generous line breaks. Luna: So it wasn't about what you said. It was about how the reader experienced the saying of it. Lucas: That's the whole insight. And there's a reason for it that goes beyond aesthetics. When a reader opens a dense block of text, their brain registers a time commitment. Subconsciously they think: this is going to take a while. So they either skim aggressively or set it aside for later — which means never. Luna: But with the sparse version, the same message feels like a quick read. You feel like you can finish it before your coffee gets cold. Lucas: Exactly. The white space signals: this is easy. And when something feels easy, people are more willing to start it and more likely to finish it. In direct mail, finishing the letter is the whole game. Luna: I wonder if this still holds in email. On a phone screen, white space costs scroll — but maybe that's the same principle in reverse. Lucas: It does hold, but you have to adapt. In email, especially on mobile, white space is even more critical because the viewport is tiny. A wall of text on a five-inch screen is terrifying. But you can't just replicate four-page margins. You have to use short paragraphs, lots of line breaks, and bullet points to create visual islands. Luna: It's interesting — this idea connects to something we touched on in episode 82 about sentence length controlling momentum. Short sentences create white space in time. Now we're talking about white space in space. Lucas: Right. And the two work together. A short sentence followed by a line break gives the reader a double signal: a pause in the rhythm and a pause in the layout. That's a powerful combination for landing a key point. Luna: Speaking of landing key points — I know this is a little off the main thread, but it's on my mind. These conversations we have every week, they take a lot of research and editing. And the reason we can keep doing them without running ads every five minutes is that a small number of listeners chip in a few dollars a month. Lucas: Yeah. If these marketing breakdowns have sparked something you've actually used — a headline you tested, a format you changed — that's exactly the kind of listener who keeps the lights on. It's buy me a coffee dot com slash fexingo. A couple of dollars a month, genuinely, is what makes this ad-free model possible. Luna: And it really does make a difference. So — back to white space. Lucas, you mentioned the test was from the early nineties. Did the publisher ever explain why they ran that test in the first place? Lucas: They did. The control was the dense letter that had been working for years. But the copy chief had read a study about how readers' eyes move across a page — eye-tracking research that showed people start reading in an F-shaped pattern. Top left, then across, then down the left margin, then across again. The denser the text, the more likely the eye skips whole sections. Luna: So white space actually guides the eye. It's like giving the reader a path. Lucas: Exactly. In the sparse version, the big margins created a clear frame, and the short paragraphs acted like stepping stones. The eye had a natural place to land after each sentence. There was no visual clutter to get lost in. Luna: I want to apply this to a landing page I'm working on. It's for a B2B SaaS product — the software helps small retailers manage inventory. The current page has a lot of feature bullets and screenshots crammed together. I'm thinking I should strip it back. Lucas: Strip it back, but don't lose the substance. You can keep all the same features — just give each one its own line, maybe a short subhead, and plenty of space before the next one. Test it. Run a split test with your current version. I'd bet the sparse version lifts conversion by at least fifteen to twenty percent. Luna: I'm going to try it. But I also want to test something from the other direction — what about using white space to draw attention to a single element? Like leaving a huge gap above the call to action button. Lucas: That's a classic tactic. If everything around the button is cramped and busy, the button blends in. But if you leave a generous margin above it — maybe half the screen — the button becomes the only thing to look at. Your eye goes there because there's nowhere else to go. Luna: It's almost like the negative space becomes a frame. And a frame makes the thing inside it feel more important. Lucas: That's the deeper principle at work here. White space doesn't just make copy easier to read — it communicates confidence. A dense, crammed page screams: we're desperate to tell you everything. A sparse, airy page signals: we trust you to get the point without being hit over the head. Luna: Interesting. So white space builds trust. And trust is the foundation of any persuasive message. Lucas: Exactly. And the data backs it up. In another test from the same era — this one from a nonprofit fundraising appeal — they sent two versions of a letter asking for donations. One was the standard single-page, dense format. The other was three pages, but with so much white space that the actual word count was identical. The three-page version raised thirty-four percent more money. Luna: That's almost identical to the forty-seven percent from the financial newsletter. So it's not a one-off. Lucas: Not a one-off. It's a pattern. And the mechanism is the same: white space reduces cognitive load. When reading feels effortless, the reader stays in a receptive state. When it feels like work, the reader's critical guard goes up. Luna: I want to get practical for our listeners. If someone is writing a sales page tomorrow, what's the single biggest white space change they can make? Lucas: Shorten your paragraphs. Aim for no more than three sentences per paragraph. And after every paragraph, add a full blank line. Even if you do nothing else — keep your margins at one inch, keep your font size the same — that one change will make the page feel dramatically more open. Luna: And for email? Lucas: Same principle, but even more extreme. On mobile, a paragraph should rarely exceed two sentences. And use whitespace to separate the key message from the supporting details. If you have a single big idea, put it on its own line, maybe in bold, with space above and below. That way, even if someone only reads the first screen, they see the core argument. Luna: I've seen marketers worry that short paragraphs make the copy feel choppy or simplistic. They think it insults the reader's intelligence. Lucas: That fear is almost always wrong. Readers are busy and distracted. They're not looking for literary prose — they're looking for information they can process quickly. Short paragraphs show respect for their time. And the data bears that out: shorter paragraphs consistently outperform longer ones in controlled tests. Luna: Alright, I'm convinced. Next time I write a sales letter, I'm going to force myself to use half the words per paragraph and double the margin width. Lucas: And then test it. Always test. But I think you'll be surprised by what the empty space does for your response. Luna: I'll report back. Thanks, Lucas. Lucas: Thanks, Luna. See you next time.