Postcards The IRIS mailing library
Upload a postcard design and have it mailed
Upload a finished JPEG, PNG, or WebP front design, adjust the crop, add the back message and addresses, and mail the postcard online after reviewing both sides.
At a glance
Direct answer
Upload the front artwork as a JPEG, PNG, or WebP image, choose 4 x 6 or 6 x 9, and adjust the crop in the postcard editor. Replace the default front title, add or remove the optional greeting, then add the back message, signature, US return address, and US recipient address. Review the front and back before payment, and IRIS will generate the print PDFs and mail the postcard.
Prepare the design file
- Export a high-resolution image without crop marks or printer guides.
- Keep important artwork away from the outer edges.
- If the artwork already contains text, leave room for the required title overlay and check the combined preview for duplication and readability.
- Use RGB color and inspect the exported file outside the design app.
- Keep the file at or below 15 MB.
- Confirm that you own or have permission to use the artwork, photographs, and type.
IRIS treats the uploaded design as front artwork. It does not accept a two-sided postcard PDF upload. The editor creates the back from the message and address information you enter.
Account for the crop
The front preview shows how the selected size frames the image. Move the horizontal and vertical focal controls before checkout. A design made at a different proportion may lose material at the top, bottom, or sides.
Sources and current instructions
Review the linked source when a mailing depends on current USPS, agency, contractual, or legal requirements.
Mail your finished postcard design
Upload the front image, check the crop, and build the addressed back in the editor.
How to send a postcard online
Create a postcard online from a photo, illustration, or finished design. Choose 4 × 6 or 6 × 9, add text and addresses, then review the card before payment.
Read the guide
How to prepare a phone photo for a mailed postcard
Prepare a phone photo for a 4 x 6 or 6 x 9 postcard, choose the crop, write a visible message, add US addresses, and mail it online from the same browser.
Read the guide
When a business postcard is appropriate
Use business postcards for short, non-confidential customer follow-up, choose the right size, and keep private or account-specific information in an envelope.
Read the guidePlanning mail for a business or team?
Tell us the mailpiece type, expected volume, and workflow you need. We will confirm whether the current IRIS letter, form, or postcard service fits.