Print on demand file requirements and specs

For paperbacks you need a print interior PDF (PDF/X-1a, CMYK, embedded fonts, correct trim + bleed) and a wraparound cover PDF. Here are the specs.

Last updated 2026-06-15

Print on demand needs print-ready PDFs — different from ebook files. Here is what your paperback requires.

Interior PDF

PDF/X-1a format, CMYK colour, fonts embedded.
Correct trim size with bleed on any element that runs to the edge — see trim sizes.
Page count that matches your file; even page counts are typical.
See how to prepare a print interior PDF.

Cover PDF

A single wraparound file: back cover + spine + front cover, with bleed — see how to create a wraparound cover.
The spine width depends on page count; use the generated template for your book.

General

High-resolution images (300 DPI) so nothing prints blurry.
No interactive elements (print is static).

Get these right and your paperback sails through the print review. If a spec is unclear, the in-app requirements for your chosen trim are the source of truth.

Still need help? Open a ticket from your dashboard or email [email protected] — a real person replies.

How do I prepare a print interior PDF (PDF/X-1a, CMYK)?

Export your interior as PDF/X-1a in CMYK with embedded fonts, the right trim, mirrored margins, and bleed on full-page images. Step-by-step guide.

How does print on demand work on Chiify?

Chiify offers paperback print on demand via IngramSpark. Upload a print interior PDF and a wraparound cover; books are printed and shipped only when ordered.

What paperback trim sizes are available?

Common paperback trims include 5x8, 5.25x8, 5.5x8.5, and 6x9. Pick the standard size for your genre. Here's how to choose and why it matters.

How are printing costs and print royalties calculated?

Print cost depends on page count, trim, and colour; your royalty is list price minus print cost and the retailer's share. Here's how the math works.

How do I create a wraparound print cover?

A wraparound cover is one PDF with back, spine, and front plus bleed. Spine width depends on page count — use the generated template. Here's how.

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