The cover image for an Amazon KDP eBook appears on the Amazon detail page. Here are a few criteria and guidelines for creating a cover image for the KDP platform.
Amazon does not allow the following issues on content uploaded to their services:
These guidelines apply to the book cover as well as book content. Review these terms and ensure the cover created is in line.
Format: The cover image must be in TIFF or JPEG format (.tif/.tiff or .jpeg/.jpg)
Dimensions:
Image ratio: The ideal image ration is 1:1.6. For every 1000 pixels in width, the image should be 1600 pixels in height.
Dots per Inch: The DPI should be 72 dpi.
File size: The image must be less that 50MB.
Color profile: The color profile should be RGB.
Find up to date information on Amazon KDP image criteria at Amazon KDP’s website.