What a full wrap cover actually is
A full wrap cover (also called a wraparound cover or print cover PDF) is the single, continuous artwork file Amazon KDP requires for paperback and hardcover books. Unlike a Kindle eBook — where you only upload a front-cover image — a print book's cover has to wrap around the entire spine of the physical book, so the file contains three panels in one PDF:
- Back cover on the left (book blurb, author bio, barcode area)
- Spine in the middle (title and author, if 79+ pages)
- Front cover on the right (the part shoppers see on Amazon)
The width of the spine — and therefore the total width of the file — depends entirely on your page count and paper type. That's the part that breaks 90% of first-time uploads: people design at the wrong width, the spine text drifts onto the front or back, and KDP rejects the file.
The one-line rule
Calculate your spine width first, design second. Every full wrap rejection traces back to a wrong spine width or missing bleed.
Anatomy of a full wrap PDF
Read your full wrap PDF left-to-right when it's laid flat. Here's what each panel needs to contain:
Back cover
- • Book blurb (200–300 words)
- • Author photo & bio (optional)
- • Endorsements / reviews
- • Barcode space (bottom-right)
Spine
- • Title (top to bottom)
- • Author name
- • Logo / imprint (optional)
- • Blank if < 79 pages
Front cover
- • Title (large, readable at thumbnail)
- • Author name
- • Subtitle / tagline (optional)
- • Hero artwork
The whole file is surrounded by 0.125" of bleed on every outer edge — extra artwork that gets trimmed off during printing. That's why the file dimensions are slightly larger than the finished book.
The exact full wrap cover formula
Three numbers determine everything: trim width, trim height, and spine width. Plug them into this:
Total Width = (Trim Width × 2) + Spine Width + 0.25"
Total Height = Trim Height + 0.25"
The +0.25" is 0.125" bleed × 2 sides.
Spine width formula (paperback)
Multiply your interior page count by the paper thickness, then add the cover allowance:
White paper: Spine = (pages × 0.002252) + 0.06"
Cream paper: Spine = (pages × 0.0025) + 0.06"
Std color: Spine = (pages × 0.0032) + 0.06"
Worked example — 6"×9", 200 pages, white paper
- Spine width = (200 × 0.002252) + 0.06 = 0.5104"
- Total width = (6 × 2) + 0.5104 + 0.25 = 12.7604"
- Total height = 9 + 0.25 = 9.25"
That's the canvas you set up in your design tool. Round to four decimal places — KDP's tolerance is tiny.
Don't round your spine
Rounding 0.5104" to 0.51" will shift your spine by 0.0004" — small enough that you'll never see it on screen, but big enough that printed text can drift onto the front cover. Always carry the full decimal through.
Spine width quick chart (paperback)
Save yourself the math. Reference values for the most common page counts:
| Pages | White | Cream | Std color | Spine text? |
|---|---|---|---|---|
| 24 | 0.114" | 0.120" | 0.137" | No |
| 50 | 0.173" | 0.185" | 0.220" | No |
| 78 | 0.236" | 0.255" | 0.310" | No |
| 79 | 0.238" | 0.258" | 0.313" | Yes |
| 100 | 0.285" | 0.310" | 0.380" | Yes |
| 150 | 0.398" | 0.435" | 0.540" | Yes |
| 200 | 0.510" | 0.560" | 0.700" | Yes |
| 250 | 0.623" | 0.685" | 0.860" | Yes |
| 300 | 0.736" | 0.810" | 1.020" | Yes |
| 400 | 0.961" | 1.060" | 1.340" | Yes |
| 500 | 1.186" | 1.310" | 1.660" | Yes |
Need a value for an exact page count? Use our free KDP Cover Size Calculator — it returns spine width, total cover dimensions, and bleed in one click.
Paperback vs hardcover — the differences that actually matter
Paperback and hardcover full wraps follow the same logic, but the formulas differ in two important ways. Get this wrong and your hardcover will look like it's missing half its case wrap.
| Spec | Paperback | Hardcover (case laminate) |
|---|---|---|
| Spine formula | (pages × paper) + 0.06" | pages × paper (no +0.06) |
| Wrap allowance | 0.125" bleed each side | ~0.5" case wrap each side |
| Minimum pages | 24 | 75 |
| Spine text minimum | 79 pages | 79 pages |
| Total file width | ~0.5" larger than book | ~1.5" larger than book |
The hardcover "case wrap" is the extra material that folds around the rigid boards on the inside of the cover. It's why the file is so much larger. Always download KDP's exact hardcover template before designing — eyeballing it never works. See our paperback vs hardcover spec breakdown for a deeper dive.
How to build a full wrap cover (step by step)
The reliable workflow, from blank canvas to KDP-approved PDF:
Lock in your specs
Decide trim size, page count, and paper type before you open any design tool. These three numbers drive every other measurement on the cover.
Calculate total dimensions
Use the formulas above (or our free calculator) to get total width, total height, and spine width to four decimal places.
Set up the canvas at 300 DPI
In Photoshop, Affinity, Canva (Pro), or InDesign, create a new document at the calculated total dimensions. Set resolution to 300 DPI. Color mode RGB is fine — KDP converts to CMYK during printing.
Draw the guides
Add vertical guides at: 0.125" (back trim), back trim + trim width (spine left), back trim + trim width + spine width (spine right), and total width − 0.125" (front trim). Add horizontal guides 0.125" inside top and bottom for the safe zone.
Design the back panel
Place blurb, author bio, and any reviews inside the back-cover safe zone. Reserve a clean 2" × 1.2" rectangle in the bottom-right (about 0.25" from the bottom and right trim) for KDP's auto-applied barcode.
Design the spine (if 79+ pages)
Center title and author name horizontally on the spine. Keep all text 0.0625" inside the spine edges. Use 8–14pt depending on spine width. Spine text should read top-to-bottom (US/UK convention).
Design the front
Make sure the title is readable at thumbnail size (about 200px wide). Genre conventions matter more than originality at thumbnail scale — buyers identify the genre in 0.4 seconds before they read anything.
Export as a print-ready PDF
Export at 300 DPI as a single PDF with embedded fonts, no transparency, and no security/password. Verify the file is under 40 MB.
Upload and verify in KDP
Upload the PDF inside KDP's paperback or hardcover content step. Use the cover previewer — zoom in on the spine and check that no text crosses the trim lines.
Design tips that pass KDP review the first time
Bleed wraps continuously across the spine
Background imagery should flow across the back, spine, and front as a single composition. Hard color breaks at the spine edges look amateur and amplify alignment errors.
Match spine background to front and back
Either let the artwork run through the spine or pick a solid color sampled from the front. A spine that doesn't match either neighbor is the #1 visual giveaway of a DIY cover.
Keep spine text 0.0625" off the edges
Printing tolerance is ±0.0625" — anything closer than that to the spine edge can wrap onto the front or back panel during binding.
Test the front at thumbnail size
Shrink the front to 200px wide. If you can't read the title, the cover loses 90% of its Amazon click-through. Bigger title type, simpler hero art.
Use 300 DPI source artwork
A blurry source image at 1024px will look soft at print scale. Generate or upscale art to at least 3,000px on the long edge before placing it.
Reserve barcode space — even if you have an ISBN
KDP overprints its own EAN barcode regardless of whether you supplied an ISBN. Leave the bottom-right back area clean.
Why KDP rejects full wrap PDFs
Almost every rejection falls into one of these six buckets. Check yours against this list before uploading:
- Wrong total width. Spine miscalculated (most common) or bleed forgotten. The previewer will refuse to load.
- Spine text drift. Spine text touches or crosses the trim line. Move text 0.0625" further inside.
- Resolution under 300 DPI. KDP flags any panel that drops below 300 DPI at print scale, including small upscaled art.
- Text in the bleed. Any text within 0.125" of the outer edge will be flagged or trimmed off.
- Embedded fonts missing. Always export with fonts embedded or outlined. KDP rejects PDFs that reference system fonts.
- Security on the PDF. Password-protected or encrypted PDFs are rejected outright.
Already rejected?
Read the fix-blurry-cover playbook and the 5 most common KDP cover mistakes for fast diagnostic checklists.
Free calculators & tools for full wrap covers
KDP Cover Size Calculator
Enter trim size + pages + paper type — get total width, height, and spine width instantly.
Open calculator →KDP Bleed & Margin Calculator
Verify bleed and safe zones for any KDP trim size. Includes ebook + print presets.
Open calculator →Royalty Calculator
See what each cover decision costs you — paperback vs hardcover, 60% vs 35% royalty.
Open calculator →Cover Mockup Generator
Drop your full wrap PDF in and get a 3D paperback render for marketing.
Open generator →