Ebook Cover Size Guide and Checker
The right cover size for every store, and a checker that tells you if your image is ready.
How to use the cover size checker
Drop your cover image into the box. The checker reads its size, shape and file type right in your browser (nothing is uploaded) and tells you whether Amazon KDP, Apple Books, Kobo and Google Play Books will accept it, with tips where a store prefers something different. Making a paperback? Switch to Paperback cover size to work out the full wrap: back, spine and front with bleed.
What makes a cover work
- Design for a thumbnail. Most shoppers first see your cover at the size of a stamp. Big, short titles and one clear image beat detail.
- Use a tall rectangle. Amazon's ideal is 1,600 × 2,560 px (1:1.6). A 2:3 cover, like 1,600 × 2,400 px, is accepted almost everywhere too.
- Don't upscale a small image. Apple asks for at least 1,400 px on the short side and says not to enlarge smaller art to get there.
- Save as RGB JPEG for ebooks, with light compression. Paperback covers are a single print-ready PDF at 300 DPI.
Koobe designs four covers per run with your title, subtitle and name lettered in, and exports the front cover as a 1,600 × 2,400 px JPEG. See the publishing guide for where it goes.
Cover sizes by store
| Where | Size | Files | Notes |
|---|---|---|---|
| Amazon KDP (Kindle eBook) | 1,600 × 2,560 px | JPEG, TIFF, ≤ 50 MB | Ideal 1,600 × 2,560 px, RGB. Upload with minimal compression; add a thin grey border to very light covers. Source |
| Apple Books | At least 1,400 px short side | JPEG, PNG | At least 1,400 px on the shorter side, RGB. Front cover only, no unnecessary borders, and do not upscale a smaller image. Apple gives no fixed ratio or file-size limit for the cover. Source |
| Kobo Writing Life | Ratio 3:4 | JPEG, PNG, ≤ 5 MB | Portrait, width about ¾ of the height, 5 MB or less, ideally 300 DPI (72 DPI is accepted). Kobo publishes no pixel minimum; its standard eReader screen is 1072 × 1448 px. Source |
| Google Play Books | At least 640 px short side | JPEG, PNG, TIFF, PDF, ≤ 2 GB | Minimum 640 px, maximum 7,200 px in height and width, under 2 GB. Google gives no ratio for eBook covers (the square recommendation is for audiobooks). Source |
| Gumroad product cover | 1,280 × 720 px | PNG, JPEG, GIF, MOV, ≤ 50 MB | Rule of thumb 1280 × 720 px at 72 DPI or more. Covers can be any shape; images over 4,096 px on the long side are resized. Up to 8 covers. Source |
| Gumroad thumbnail | 600 × 600 px | PNG, JPEG | Optional square thumbnail of at least 600 × 600 px, shown in libraries, Discover and your profile. Source |
| Etsy listing photo | At least 2,000 px short side | JPEG, PNG, GIF, SVG, HEIC, ≤ 1 MB | Etsy recommends at least 2,000 px in width and height; the first photo must be at least 635 px each way to avoid ranking lower. Files over 1 MB may not finish uploading. Use images that crop well to square and rectangle. Source |
| PDF sold directly (common choice) | 1,600 × 2,400 px | JPEG, PNG | Not an official spec. 2:3 (e.g. 1,600 × 2,400 px) or 1:1.6 (1,600 × 2,560 px, the KDP ideal) works across most stores. Source |
Cover size examples
1,600 × 2,560 px JPEG
Amazon’s ideal size. Accepted by Apple Books, Kobo and Google Play Books too.
1,600 × 2,400 px JPEG (2:3)
Accepted by all four stores. Amazon shows it with its own proportions, which are a little shorter than its ideal.
6 × 9 in paperback, 180 pages, white paper
Full wrap 12.655 × 9.25 in with bleed (3,797 × 2,775 px at 300 DPI), spine 0.405 in.
Ebook cover size guide FAQ
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What size should an ebook cover be?
Use 1,600 × 2,560 px for Amazon KDP, its ideal. That size also meets Apple Books (at least 1,400 px on the short side), Kobo and Google Play Books (at least 640 px).
What file type should I use?
JPEG works everywhere for ebooks. KDP also takes TIFF, and Apple, Kobo and Google accept PNG. Paperback covers on KDP are uploaded as one PDF.
Does my image leave my computer?
No. The checker reads the image inside your browser. Nothing is uploaded or stored.
How wide is a paperback spine?
On KDP, multiply your page count by 0.002252 in for white paper or 0.0025 in for cream. A 180-page book on white paper has a 0.405 in spine.
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