What Size Ebook Cover Do I Need?There is a lot of confusion about what size to make ebook covers and what type of files are needed by different publishing platforms. Each publisher’s website has the information you need, but it’s often hard to find and there are subtle differences between each of the different publisher. This article is designed to help authors better understand what is needed for each of the major publishing platforms.

JPEG, PNG or TIFF?

I prefer to use either a JPEG or PNG at 300 dpi for the ebook publisher files I send my clients.

With a 300 dpi file, your ebook cover file has all the details and will support higher resolution monitors as they become the norm. The various publishing platforms will each scale the artwork down and change the resolution if needed for the different ebook readers and websites where your ebook cover appears.

JPEG (JPG) is the most commonly used format for ebooks. I create uncompressed (100 quality) JPEG files for ebook covers, as this provides the sharpest image with a file size of about 1 to 1.5 megabytes.

PNG files will work just as well as JPEG and the file size is similar as well.

TIFF (TIF) files are accepted by several publishing platforms. If you prefer a TIFF file, I will use 72 dpi in order to keep the file size below 2 megabytes to avoid uploading problems.

Sample JPEG file

To view a sample JPEG file and see the high detail, click here. The file is 1600 by 2400 pixels at 300 dpi and is 1.4 megabytes.

File uploading restrictions

Just about all the publishing platforms restrict cover file uploading to under 2 megabytes. Since you are uploading your file to the publisher’s server, the file size is checked as you upload and files that are too large will not be uploaded.

The digital artwork file size for ebook covers I create are well below 2 megabytes when I generate a JPEG or PNG file, so file uploading to various publishing platforms is usually not an issue.

Ebook Publishing platforms and file sizes

Publishing Platform
Cover Size Recommended (in pixels)
File Format
DPI
Notes
Amazon/Kindle Direct Publishing
1618 x 2500
JPEG, TIFF
300
According to the Amazon website: “Requirements for the size of your cover art have an ideal height/width ratio of 1.6, this means a minimum of 625 pixels on the shortest side and 1000 pixels on the longest side. For best quality, your image would be 1563 pixels on the shortest side and 2500 pixels on the longest side.”
Apple iBooks
1618 x 2500
JPEG, PNG
300
Cover should be at least 1400 pixels wide.
Barnes & Noble
1618 x 2500
JPEG, TIFF
300
Minimum height for a cover is 1200 to 2000 pixels.
Book Baby
1400 x 2100
JPEG, PNG, TIFF
300
According to Book Baby’s website: “Cover image: At least 1400 px wide, portrait or vertical rectangle-shaped artwork (no squares) and we recommend a height/width ratio of 1.6 (1400 px wide x 2100 px high)."
Draft 2 Digital
1600 x 2400
JPEG
300
According to Draft 2 Digital’s website: “A 1600 x 2400 JPEG works best, but any tall rectangle will do. We’ll resize whatever you send to meet the requirements of your chosen sales channels.”
Google Books
1618 x 2500
JPEG, PNG, TIFF, PDF
300
According to Google Book’s website: “If you're planning to sell your book on Google Play, provide your book content in both ePub and PDF format to give your readers more viewing options. However, only one format is required.”
Kobo
1618 x 2500
JPEG, PNG
300
According to Kobo’s website: “Please ensure that the image you upload is saved as a JPEG or PNG file. For best results, your image should be no larger than 2 MB.”
Lulu
612 x 792
JPEG
72
According to Lulu’s website: “You will need to upload a full size cover image. 612 x 792 pixels (8.5 in 11 in at 72 DPI) is preferred to avoid blurriness.”
Smashwords
1618 x 2500
JPEG, PNG
300
According to Smashwords’ website: “Cover images should be vertical rectangle-shaped, not squares, and must be a minimum width of 1,400 pixels. A recommended size is approximately 1,600 pixels wide by 2,400 pixels tall.”
Website Publishing
1618 x 2500
JPEG
300
Actual dimensions of image on website will vary depending placement in website so cover will be resized to fit web page space (i.e. 500 wide or 300 wide, etc. depending on space available)

Please note that publishers will change their ebook cover specifications from time to time. Information is accurate as of Fall 2016. Please let me know if you learn of any new changes by emailing me.

Print book sizes

Please see What Size Should I Make My Print Book Cover? for details about printed book cover sizes, width to height ratios, file types and other information about ebook publishing.