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Postcards remain one of the simplest, most cost-effective ways to put a physical message in front of customers — no envelope to open, no app to download, just the message right there when the mail arrives. Getting a postcard mailing right comes down to a handful of fundamentals that haven’t really changed, plus a couple of USPS specifics worth knowing before you finalize a design.
Keep the Message Clear and Singular
It’s tempting to use every square inch of a postcard to pack in information, but a postcard with too much going on tends to get skimmed past rather than read. Pick one main message — a promotion, a new service, a single offer — and let the design support that one thing with large lettering, a clear visual hierarchy, and enough white space that the message doesn’t have to compete with itself.
Give People a Clear Next Step
A postcard without an obvious call to action is easy to set aside and forget. Tell the recipient exactly what to do — call, visit a website, come into a store — rather than assuming they’ll figure out the next step on their own. Where the original version of this advice would have just said “visit our website,” modern postcards have more options for making that step frictionless: a QR code or a personalized URL that links directly to a relevant landing page removes a step compared to making someone type in a web address, and lets you track who actually responded.
Include Contact Info and a Return Address
A return address and visible contact information signal that a mailing is legitimate and that the sender is reachable, not just broadcasting one-way. There’s also a practical benefit: with a return address and a properly formatted Intelligent Mail barcode, undeliverable postcards get routed back or flagged rather than silently disappearing, which gives you a way to clean up a mailing list and avoid paying to mail to the same bad address repeatedly.
Know the USPS Size Rules Before You Design
USPS defines specific dimensions that a mailpiece has to meet to qualify for First-Class Mail postcard pricing rather than being charged as a letter. A standard postcard has to be rectangular, at least 3.5″ x 5″, no larger than 4.25″ x 6″, and between 0.007″ and 0.016″ thick — and USPS has since extended that ceiling to 6″ x 9″ for commercial presorted or automation mail, giving designers more room without losing postcard-rate pricing. Going even slightly outside those dimensions bumps the piece into letter or flat pricing, which costs more per piece — worth confirming before a print run goes out rather than after. USPS publishes current postage rates directly, since prices are adjusted periodically.
Getting Started
Tab Service Company’s direct mail marketing services handle the printing, personalization, and mailing of postcard campaigns at volume, within a broader set of printing and mail services for businesses that need other mail types handled as well.
Bottom Line
A strong postcard comes down to a clear single message, an obvious next step, and enough legitimacy markers that people trust it’s worth their attention — the same fundamentals that have always mattered, just with a few more tools (QR codes, trackable links) available to make the response step easier than it used to be. If you’re planning a postcard campaign and want help with production and mailing, contact Tab Service Company to talk through what that would look like.
Sources
- Sizes for Postcards — USPS Postal Explorer
- FAQs for the New Larger Sized Postcard — USPS PostalPro
- Postage Rates & Prices — USPS.com
