How to make a book spine in Canva without guessing the width

What to check

1. For a 6 × 9 inch, 300-page KDP paperback on white paper, the spine is 0

For a 6 × 9 inch, 300-page KDP paperback on white paper, the spine is 0.676 inches.

2. Add 0

Add 0.125 inches of bleed to both outside edges and to the top and bottom of the complete wrap.

3. Keep spine type centered with at least 0

Keep spine type centered with at least 0.0625 inches of clear space on either side.

Use the final production inputs

Calculate from the final formatted page count, not the manuscript estimate. Select the exact trim, binding, interior type, and paper stock before creating the cover sheet. If any of those values change, regenerate the dimensions and compare the exported PDF against the printer's current template.

Artwork, type, spine, and back-cover copy remain editable when the print setup changes.

Sources: Canva book-cover maker · Amazon KDP cover calculator. Recheck the current printer template before export.

Frequently asked questions

Can one cover PDF be used for every printer?

No. Export from the current template for the selected printer, binding, paper, trim, and page count.

When should I calculate the spine?

After the interior is formatted and the final page count is known.

Can Coverfairy update an existing design?

Yes. Change the print setup while preserving editable art and typography.