Postcard PDF guidelines

• postcard_size="4x6" requires a 6.25in x 4.25in bleed canvas on both pages.
• postcard_size="6x9" requires a 9.25in x 6.25in bleed canvas on both pages.
• postcard_size="11x6" requires a 11.25in x 6.25in bleed canvas on both pages.

These are bleed dimensions, not trim-only dimensions. Do not upload a 6.00in x 4.00in or 9.00in x 6.00in PDF and assume PostalForm will expand it for you.

• Keep all critical artwork, logos, and text inside your own safe area.
• Keep the mailing side clean enough for address placement, postage or indicia, and barcode handling.
• In PostalForm's template downloads, page 1 is the artwork/front guide and page 2 is the current Lob mailing-side guide for that size.
• Do not typeset sender/recipient names or mailing addresses into the postcard PDF. Provide sender/recipient data in the order fields instead.
• Do not invert the page order. PostalForm treats page 1 as the artwork side and page 2 as the mailing side.
• On page 2, leave Lob's reserved mailing block clear. Lob prints the address, indicia, and barcode there.
• If you include a message on page 2, keep it out of Lob's reserved mailing block.

• 4x6 postcard template
• 6x9 postcard template
• 11x6 postcard template

Each download remains a 2-page PDF so you can keep the same PostalForm upload flow:

• Page 1 keeps the existing front-side bleed, trim, and safe-area guide.
• Page 2 matches Lob's current postcard mailing-side template for that size.

Use the same machine endpoints you already use for letters. The only additions are:

• mailpiece_type: "postcard"
• postcard_size: "4x6" | "6x9" | "11x6"

Your pdf field should point to the final 2-page postcard PDF itself, using the same accepted PDF input formats as letter uploads.