KDP Cover Dimensions: How to Size Your Book Cover Correctly (2026)

Getting your KDP cover dimensions right is one of those small technical details that decides whether your book sails through KDP review or bounces back with a rejection email. Your cover is the first thing every reader sees, and Amazon enforces strict specs — from the 2560 x 1600 pixel eBook cover to the exact spine-width math your paperback wraparound requires. This guide covers every 2026 requirement for eBook, paperback, and hardcover covers, with formulas, templates, and fixes. For the bigger design picture, see our cover design and formatting guide.

Whether you are building the cover yourself in Photoshop, Canva, or Affinity — or handing it to a designer — knowing the exact numbers protects you from blurry thumbnails and rejected uploads. We will cover the 1.6:1 eBook ratio, paperback cover math, spine-width formulas for white and cream paper, case laminate versus dust jacket hardcovers, KDP’s free cover template generator, safe zones and barcode placement, 300 DPI and RGB color rules, and the most common rejection reasons.

eBook Cover Dimensions: The 1.6:1 Rule

The Kindle eBook cover is the simplest cover you will size. KDP requires a minimum of 625 x 1000 pixels, but the recommended size is 2560 x 1600 pixels. The critical rule is the ratio: height divided by width must equal 1.6, the classic 1.6:1 book-cover proportion. A cover at the wrong ratio gets stretched, squished, or letterboxed in search results and also-bought carousels, which quietly costs you clicks.

Upload your eBook cover as a JPEG or TIFF (JPEG is fine for most books at maximum quality) under 50 MB, in the sRGB color profile. Design at full resolution, then check legibility at thumbnail size — your title should still be readable when the cover is only about 100 pixels wide. Tiny serif subtitles, thin scripts, and low-contrast text vanish at thumbnail scale, so simplify before you export.

eBook cover quick specs

• Recommended size: 2560 x 1600 pixels (minimum 625 x 1000)
• Aspect ratio: 1.6:1 (height to width)
• File types: JPEG or TIFF, maximum 50 MB
• Color profile: sRGB, exported at full quality
• No blurry, pixelated, or stretched artwork — design at final size

Paperback Cover Math: Front + Spine + Back + Bleed

A paperback cover is not a single front panel — it is one wraparound PDF that includes the back cover, the spine, and the front cover in a single sheet, plus bleed on every edge. The formula is simple: total width = back cover width + spine width + front cover width + 0.25" (0.125" of bleed on each side), and total height = trim height + 0.25". Bleed is the extra artwork beyond the trim line; without it, you risk thin white edges on the finished book.

Here is a worked example. Take a 6 x 9" paperback with 300 pages on cream paper: the spine width is 300 x 0.0025" = 0.75". Total width = 6" + 0.75" + 6" + 0.25" = 13", and total height = 9" + 0.25" = 9.25". Export that 13 x 9.25" layout as a single print-ready PDF. Your trim size must exactly match your interior file — a 6 x 9" interior with a 5.5 x 8.5" cover is an instant rejection. The math works the same for any trim size.

Your page count must be the final interior page count, including blank pages, because every page changes the spine. Finalize your interior first — our complete KDP formatting guide walks through the interior side — then calculate the spine and build the cover.

How to Calculate Your Spine Width

KDP publishes two spine-width formulas, one for each paper type, because cream paper is thicker than white. For white paper, multiply your page count by 0.002252". For cream paper, multiply your page count by 0.0025". So a 200-page book on white paper gets a 0.45" spine (200 x 0.002252" = 0.4504"), while the same book on cream gets a 0.5" spine. Let KDP’s template generator confirm the number before you export.

Two hard rules govern spine text. First, KDP only prints spine text on paperbacks with 79 or more pages — if your book is shorter, leave the spine blank or your cover will be rejected. Second, spine text must sit comfortably centered on the spine, well clear of the fold lines where the cover wraps around the book block. Double-check the text against the template’s marked spine area rather than eyeballing it.

KDP paperbacks run from 24 up to 828 pages on white paper (722 on cream), and every page shifts your spine math. If you add a chapter late, recalculate the spine and regenerate the template.

KDP Hardcover Covers: Case Laminate vs Dust Jacket

KDP hardcovers come in two cover styles, and the dimensions differ for each. Case laminate prints your artwork directly onto the hard case — it is a single wraparound PDF covering the back board, spine, and front board, plus the wrap areas that fold around the case edges and the usual 0.125" bleed. Dust jacket is a separate paper jacket with flaps that tuck inside the front and back boards, so the file is wider: back panel + spine + front panel + two flaps + bleed on all sides.

Case laminate is the simpler choice for most self-publishers: one file, no flaps to design, and a durable finish. A dust jacket looks more premium and gives you extra flap space for author bios and endorsements, but the extra width and fold lines make the layout fussier. Either way, do not guess the measurements — KDP’s hardcover template marks the board edges, hinge scores, and flap folds for your exact page count.

Hardcovers accept 75 to 550 pages, and spine-text minimums apply here too — confirm eligibility before investing hours in the cover art.

Using KDP’s Cover Template Generator

You never have to do the cover math by hand. KDP offers a free cover template generator: enter your trim size, paper type, interior page count, and cover finish, and it produces a downloadable template — usually a PDF and a PNG — with the exact dimensions, marked spine area, bleed guides, and barcode zone for your specific book. The official template is what KDP’s review team measures against — trust it over third-party calculators.

Place it as a locked background layer, build your artwork above it, and keep the guide marks visible until export. The template shows you where the spine folds, where bleed ends, and where the barcode will land — designing against those guides is the single best way to avoid a rejection. Generate a fresh template whenever your page count changes, even by a few pages, because the spine width moves with it.

Template workflow in five steps

• Finalize your interior first, then note the exact trim size, paper type, and page count
• Download the matching template from KDP’s cover section for your book
• Lock the template as a background layer in Photoshop, InDesign, or Affinity
• Design the front, spine, and back within the marked guides and safe zones
• Export a single print-ready PDF at 300 DPI in sRGB, then upload and preview in KDP

Safe Zones, Barcode Placement, Resolution, and Color

Beyond raw dimensions, four technical details decide whether your cover prints cleanly. First, safe zones: keep all important text and logos at least 0.25" inside the trim edges on every panel, and keep spine text centered with comfortable margins from the fold lines. Anything in the bleed or gutter can be trimmed or swallowed by the fold.

Second, barcode placement. KDP automatically places your ISBN barcode — a white rectangle roughly 2" x 1.2" — on the back cover, typically in the lower-right area. Leave that zone clear of text, faces, and critical artwork, and do not add your own barcode image there; KDP generates it from your ISBN at print time. Design your back-cover copy to sit above or beside the reserved area.

Third, resolution: export print covers at 300 DPI (pixels per inch), with all images at full resolution and fonts embedded or outlined. A 72-DPI web graphic blown up to cover size prints soft and blurry — one of the most frequent rejection causes. Fourth, color: use sRGB (RGB) for everything, including print covers — KDP recommends RGB because CMYK conversions can shift colors unpredictably. Flatten transparencies and export one clean PDF.

Why KDP Rejects Covers (and How to Fix Each Issue)

KDP’s review team rejects covers for a short list of repeat offenses, and each has a straightforward fix — most are common formatting mistakes you can catch with a pre-upload review.

• Low resolution. Print covers under 300 DPI print blurry. Fix: rebuild from full-resolution source images at 300 DPI and re-export.
• Wrong trim size or missing bleed. The cover must match your interior’s trim size exactly, with 0.125" bleed on every side. Fix: regenerate the KDP template and re-layout the artwork on it.
• Spine text on a short book. Paperbacks under 79 pages cannot carry spine text. Fix: remove the spine text or leave the spine blank.
• Text in the bleed or gutter. Copy that runs past the trim line gets cut off. Fix: pull all text into the safe zone, at least 0.25" inside trim.
• eBook cover under 625 x 1000 pixels or off-ratio. Small or stretched covers get flagged. Fix: redesign at 2560 x 1600 pixels in the 1.6:1 ratio.
• CMYK color shifts. Colors print duller or off-hue after conversion. Fix: switch the document to sRGB and re-export the PDF.

If a cover is rejected, KDP’s email names the specific reason — fix exactly that, re-upload, and resubmit. Each rejection cycle costs you days.

Your Pre-Upload Cover Checklist

Run through this checklist before every upload — five minutes that prevents most rejections.

• eBook cover is 2560 x 1600 pixels, 1.6:1 ratio, JPEG or TIFF, under 50 MB
• Print cover is one PDF: back + spine + front + 0.125" bleed on all sides
• Spine width calculated from the final page count and correct paper type
• Trim size matches the interior file exactly
• All text sits inside the safe zone, 0.25" clear of trim edges
• Spine text only if the book has 79 or more pages
• Barcode zone on the back cover left clear for KDP’s ISBN barcode
• Print PDF exported at 300 DPI in sRGB, fonts embedded
• Cover previewed in KDP’s launch previewer at full size and thumbnail size

Conclusion: Sized Right, Published Without Drama

KDP cover dimensions follow a simple pattern: eBook covers live in pixels (2560 x 1600, 1.6:1), print covers live in inches (back + spine + front + 0.125" bleed), and KDP’s template generator does the hard math. Size once from the final page count, keep text in the safe zones, leave room for the barcode, and export at 300 DPI in sRGB.