eBook Cover Dimensions & File Size for Major Publishing Sites

eBook Cover Dimensions & File Size
What are the Correct eBook Cover Dimensions for the Major Pushing Sites
This post provides the correct eBook cover dimensions and file size for major eBook publishing sites and where to find some of the information should their specifications change.

It can be disappointing spending time or money designing an eBook cover only to find that the dimensions are incorrect and it looks stretched or blurred after uploading it to an eBook publishing site. It can be difficult finding out what the requirements are for you eBook cover from the various distributors so here are the requirements below and my own recommendation.

While the requirements differ for different eBook publishing sites based on my experience as a general rule eBook covers should be at least 1500 to 1,800 pixels wide and have heights that are around 1.5 greater than the width. Therefore if you have an eBook that is 1,700 pixels wide this would make the height 1,700 x 1.5 = 2550 pixels. This makes it easier to downsize to smaller sizes but similar dimensions.

Consider using a high dpi resolution of between 260 dpi to 300 dpi so you can use the eBook for a print paperback version later on. Print versions require higher resolution. Try not to upsize eBooks or they will lose resolution and can end up looking pixelated or blurry. It is better to create a large book cover and then downsize later if necessary. When publishing the eBook you may need to reduce the resolution and size thereby creating a smaller file size.

To find out the dimensions and file size of your eBook simply right click on the eBook file and select properties. This will provide the Dimensions, Width, Height, Resolution and File size.

Smashwords

eBook Cover Dimensions: Minimum width of 1,400 pixels (height greater than width)
File size: Less than 5 MB
Resolution: Not specified

Extra info
Minimum width of 1,400 pixels (recommended size approximately 1,600 pixels wide by 2,400 pixels tall)
Height must be greater than the width
File type should be .jpg, .jpeg or .png
2D only
Front only
Must contain Book Title and Author Name
Must NOT contain web addresses on front cover
Smashwords Style Guide

Kobo

eBook cover Dimensions: Not specified
File Size: Limit of 2 MB
Resolution: Not specified

Extra info
File type should be .jpg or .png
Recommend 900 DPI (dots per inch)
The user guide below states that the file size limit is 1 MB but it appears to have increased since then.
Kobi Writing Life User Guide

Kindle Direct Publishing (Amazon)

eBook cover Dimensions: 2,500 pixels tall by 1563 pixels wide (recommended)
File size: If over 2MB you are charged a little more per download
Resolution: Not specified
Ratio: Height 1.6 times greater than the width (recommendation)

Extra info:
Accepts either .JPG, JPEG or Tiff or .tif(f)
The eBook cover size should be a minimum of 1,000 pixels tall by 625 pixels wide (2,500 pixels by 1,563 pixels recommended)
eBook Cover Design Guide

Apple iBooks

eBook Cover Dimensions: At least 1,400 pixels wide (Starting August 2014).
File size: Not specified
Resolution: Not specified

Barnes and Nobel

eBook Cover Dimensions: Ideally 1,400 pixels wide
File size: Less than 2MB
Resolution: Not specified

Extra Notes:
File type should be .JPG or .PNG or GIF for book covers with few colors
File size: Between 5Kb and 2MB
Height and width of the eBook must be at least 750 pixels (recommended height and width of at least 1400 pixels)
B&N Press: Formatting Guidelines

Bookbaby

eBook Cover Dimensions: At least 1,400 pixels wide
File size: Not specified
Resolution: minimum 72 dpi

Notes:
Recommends a height versus width ratio of 1.6
All images must be in .png, .jpg, or .tif format
Recommends a height to width ratio of 1.6 (1400 pixels wide by 2100 pixels high)
Preparing for eBook Conversion

LULU

eBook Cover Dimensions: Recommended to be 612 x 792 pixels.
File size: not stated
Resolution: 72 DPI

Notes:
Lulu are very specific in regard to the shape, size and min DPI of the Epub cover. It is best to keep to the dimensions specified otherwise you can end up with white borders around your art.
Lulu forum on eBook cover size

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