The standard postcard size for mailing is 4 x 6 inches, the largest format that still qualifies for USPS postcard pricing. Many U.S. businesses go larger, choosing 5 x 7, 6 x 9, or 6 x 11 inches to stand out in the mailbox. Knowing the standard postcard size for mailing before artwork begins keeps postage, layout, and response rates under control. This guide covers common formats, USPS considerations, and production choices, so your postcard printing and mailing order goes smoothly.
Most business mailings use one of four formats. Each suits a different goal, budget, and level of detail.
You can compare these formats and stocks in our postcards range. The standard postcard size for mailing keeps costs lowest, while larger formats earn their extra postage when the offer needs more room.
Cards up to roughly 4.25 x 6 inches generally receive postcard pricing, while larger pieces are typically priced as letters or flats. Thickness matters as well.
These rules are why the standard postcard size for mailing is the safest starting point for first-time campaigns. Our team handles these checks as part of direct mail services, so your format is verified before printing begins.
Size should follow purpose, not habit.
For neighborhood-level reach without a named list, Every Door Direct Mail targets carrier routes. Its size requirements differ from addressed mail, so confirm them before design. If you are unsure which size to use, test two formats against the same list and compare response before committing to a large run.
A smaller card demands sharper messaging. Limit each side to one headline, one offer, and one call to action.
Professional graphic design support helps you fit a clear message and a QR code without crowding the layout.
Mail handling is rough on paper, so stock choice protects your investment.
For larger quantities, offset printing delivers consistent color and a lower cost per piece, while digital suits shorter runs and personalization.
Even a perfectly sized card underperforms when it reaches the wrong households.
Well-maintained data through mailing list management keeps your postage spent on likely buyers. Time your mail drop so cards arrive before your promotion starts, and allow for production and mail-handling time.
Choosing the standard postcard size for mailing or a larger format is easier with a partner who prints and mails every day. Copies America has served U.S. businesses for over 40 years, handling design, printing, and mailing under one roof. Share your quantity, audience, and timeline, and Copies America will recommend a format that fits your postage budget. Contact Us today to request a quote and get your postcards in the mail on schedule.
The standard postcard size for mailing is 4 x 6 inches. It is the largest size that qualifies for USPS postcard pricing, which makes it the most economical option. Larger formats such as 5 x 7, 6 x 9, and 6 x 11 inches are popular but usually mail at letter rates.
The 6 x 9 inch postcard is among the most popular sizes for direct mail marketing. It offers enough room for a strong headline, offer, and call to action while remaining easy to handle. Many businesses choose it for promotions, event invitations, and new customer campaigns.
A mailing postcard should be thick enough to run through USPS sorting equipment without bending or jamming, typically printed on 14 pt to 16 pt cardstock. USPS sets minimum thickness rules, so lighter stock risks rejection or surcharges. Confirm current requirements with your printer before approving a proof.
Yes, postcard size directly changes postage cost. Cards within USPS postcard dimensions qualify for the lowest rate, while larger sizes are priced as letters or flats. Presort discounts and mailing class also affect the final price, so compare size options before finalizing your design.
A mailing postcard needs 0.125 inch of bleed on every side. Bleed extends your background color or image past the trim line so no white edges appear after cutting. Keep important text and logos at least 0.25 inch inside the trim edge.
Get insider tips about printing, design, marketing and more on your favorite social network.
Enter your registered email address to reset your password. An email will be sent to your registered email address with a password reset link
If you don’t remember your email address please give us a call during normal business hours 9:00 am – 7:00 pm EST at 1-800-423-2679 or leave a voice mail and we will return your call next business day.
Don’t have an account?
Create a new account
