What Is Bleed in Book Printing? KDP Setup Guide (2026)

Bleed is an extra 0.125 inches (3mm) added to each outer edge of your document layout. This extra space ensures that when the physical pages are trimmed to size, your images and backgrounds reach the edge without leaving a white border.

Since paper cutting machines have slight shifts of up to 1/16th of an inch, extending your graphics beyond the trim line prevents alignment errors. If you do not include this safety space, a slight cutting shift will leave a white sliver along the side of the page.

To set up a full-bleed page, add 0.125 inches to the top, bottom, and outer trim edges of your page. For example, if your final trim size is 6x9 inches, you must set your document size to 6.125 inches wide by 9.25 inches high.

Here are the standard page size calculations for popular sizes:

• 5x8" Trim -> Full Bleed Size: 5.125" x 8.25"
• 5.5x8.5" Trim -> Full Bleed Size: 5.625" x 8.75"
• 6x9" Trim -> Full Bleed Size: 6.125" x 9.25"

This setup is easy in Adobe InDesign, but difficult in Microsoft Word. To compare the layout capabilities of these platforms, read our guide on Microsoft Word vs. InDesign.

You must select the "Bleed" option on Amazon KDP if any image, illustration, or background color touches the physical edge of the page. This rule applies to children's books, cookbooks, poetry chapbooks with decorative backgrounds, and photo journals.

If your book is a standard novel or non-fiction title with text sitting inside clean margins, select "No Bleed" during setup.

If you are formatting a digital edition, remember that eBooks do not use bleed settings because text flows dynamically on e-readers. Learn more about digital files in our eBook formatting guide.

The most common mistake is placing important content like text or page numbers in the outer safety zone. The safety zone is the inner 0.25-inch margin next to the trim line.

If elements sit in this zone, the cutting blade can cut them off during binding.

Another mistake is ending your background images exactly at the trim line instead of extending them to the bleed boundary, resulting in thin white gaps.

For professional formatting that prevents these errors, explore our book formatting services or reach out via our contact page for a free layout review.

Authors often fix interior bleed but upload a cover PDF without bleed on the wrap—then wonder why the gradient stops short on the edges.

Paperback cover: Full wrap includes front + spine + back. Bleed extends past trim on outside edges. Barcode zone stays in safe area on back cover.

Interior: Bleed is per page; novels may have zero bleed if no full-page art.

When KDP asks "Does your book have bleed?" it refers to the interior file, not the cover upload screen (cover templates have separate bleed guides).

After export, open PDF properties and confirm page dimensions. Order one proof. Pair with print-ready PDF checklist and how to format for KDP.