Book cover template: how a full wrap with spine, back and barcode is built

A book cover template for a printed book is a single canvas: the back cover on the left, the spine in the middle, the front on the right, and a thin strip of bleed around the outside that gets trimmed off. The spine width comes from your page count and paper, text stays at least 0.125 in away from every trim line, and the back needs a clear area for the ISBN barcode. If you just need the numbers, our free KDP cover calculator works them out and gives you an SVG template with guides.

Below you'll see the anatomy on a real example, the KDP and IngramSpark specs side by side, what belongs on the spine and back, and what changes for ebooks and audiobooks.

What's on a full book cover template?

Read from left to right, the printer sees:

The front sells the book online, the back sells it in a shop, the spine sells it on a shelf. If you only designed a front, you have a third of a paperback cover.

How do you calculate the template size?

Every print service uses the same formula:

• Width = bleed + back cover + spine + front cover + bleed
• Height = bleed + trim height + bleed

For a 6 × 9 in paperback with 240 pages on white paper at KDP: spine 240 × 0.002252 in = 0.540 in, width 0.125 + 6 + 0.540 + 6 + 0.125 = 12.790 in, height 0.125 + 9 + 0.125 = 9.25 in. At 300 dpi that's a canvas of 3,837 × 2,775 pixels. On cream paper the same book has a 0.600 in spine. The example above was set up with 3 mm bleed and a different paper, which is why its spine is 14.4 mm. That's the point: the template from the service you print with is the one that counts.

The paper factors for every KDP paper type, a worked example for a 5.5 × 8.5 in novel and the hardcover rules are in our guide KDP spine width. For the spine alone, use the book spine calculator.

KDP and IngramSpark compared

As of 7 November 2026, from the KDP help pages and the IngramSpark File Creation Guide (sources below). For IngramSpark you must use the template from its generator; it arrives by email, and apart from the barcode nothing on it may be moved. To turn a finished file into the PDF/X format IngramSpark asks for, use our PDF/X-1a converter.

How to design the spine

The spine is all a reader sees on a shelf. Three rules:

1. Only with enough pages. KDP rejects a cover with spine text if the book has fewer than 79 pages. IngramSpark's limit is 48 pages.
2. Keep off the folds. At KDP, leave at least 0.0625 in between the text and each spine edge, or the type can wrap onto the front or back when the book is bound.
3. Keep it short. Title and surname are enough. A 0.540 in spine leaves about 0.41 in for the type after the margins. A subtitle won't be readable there.

Run the background across the spine so a fold that lands slightly off doesn't show as a hard edge. A colour change exactly on the fold line forgives no shift at all.

What goes on the back cover?

Top to bottom:

• Hook: one or two lines that pick up the reader's question.
• Blurb: a short text on what the book is about and what the reader gets from it. The book blurb tool drafts one from your manuscript.
• Author line and, if you have one, a publisher logo.
• Barcode in the lower right, on a white background.

This is where KDP and IngramSpark differ. KDP automatically places a barcode on the back if you don't supply your own; you keep the area clear that the KDP template shows. IngramSpark requires a barcode on every cover. A barcode you create must be 100% black on a white box; if you don't supply one, leave an area of at least 1.75 × 1 in. You can make a barcode from your ISBN for free with the ISBN barcode generator.

Ebook and audiobook covers

An ebook only needs the front. KDP recommends 2,560 pixels high by 1,600 wide, at least 500 pixels on the longest side and no more than 50 MB. Spine, barcode and back cover don't belong in it, and neither do prices or time-limited offers. IngramSpark takes an RGB JPG for ebooks with at least 1,600 pixels on the shortest side.

An audiobook cover is square. ACX, Audible's audiobook platform, asks for at least 2,400 × 2,400 pixels, RGB, no more than 8 MB, title and author clearly readable, no barcode, and no borders added to turn a portrait image into a square. You have to rearrange the paperback artwork for it, not just crop it.

Three ways to a full cover

As of 7 November 2026; KDP details from the KDP help pages (Cover Creator, Create a Paperback Cover). Kindle Direct Publishing and IngramSpark are trademarks of their respective owners. Bookfairy is not affiliated with them.

With the Bookfairy cover tool you enter title, trim size and page count and see three drafts for free. The finished cover comes with front, spine and back in your measurements as a print PDF, plus the front for your ebook, and you ask for changes in your own words.

Common mistakes on spine and back

1. Cover built before the interior was final. One more chapter and the spine is wrong.
2. Paper changed. Designed for white, ordered cream: at 240 pages that's 0.06 in.
3. Text in the bleed. Anything closer than 0.125 in to the trim can be cut.
4. Pattern behind the barcode. It makes the barcode unreadable; IngramSpark replaces unscannable barcodes without telling you.
5. Spine text on a thin book. Under 79 pages KDP rejects the cover.
6. Paperback file used as the ebook cover. Spine and back don't belong in a store thumbnail.