The quiet superpower of a postcard is that it cannot be ignored the way an envelope can. There is nothing to open — the message is read in the two seconds between mailbox and recycling bin, whether the reader intended to or not. Winning those two seconds is the whole game.
Pick a size for the job
Small postcards (4" x 6") are the economical volume play — cheapest to print and mail, perfect for coupons and reminders. Mid sizes (5" x 7") stand out in the stack without jumbo postage. Large formats (6" x 9" and up) dominate the mailbox and give design room to breathe — our postcards run up to 28 size options, so the format can match the message.
Stock is credibility
A flimsy card whispers discount; a thick one implies substance. 14PT is the reliable standard; premium 16PT earns its cost for real estate, medical and finance mailers where trust is the product. A specialty stock like metallic foil makes the card itself the attention-getter. Choose matte stock if you will add handwritten notes — an uncoated matte surface takes ballpoint cleanly, and handwriting reliably lifts response.
The two-second front, the working back
The front earns attention: one image, one benefit-driven headline readable at arm's length, no paragraph. The back does the work: the offer, the deadline, the action — call, scan, visit — and room for the address block. One offer per card; postcards fail when they try to say three things.
Offers that move
Specific beats vague every time: "$50 off your first service" outperforms "quality you can trust." Add a deadline — open-ended offers get filed and forgotten. A QR code to a matching landing page makes response measurable; give each campaign its own code and you will know exactly what worked.
Frequency beats size
One mailing is a test; three mailings to the same list is a campaign. Response compounds with familiarity, which is why the classic sequence — introduce, remind, last-chance — outperforms a single bigger drop at the same budget.
Pair your mailing with matching flyers for counter pickup, and run your artwork through our free file check — mail-panel clearances included — before anything prints.