A set of test images for MOBI/AZW ebooks on the Kindle based on a 388x59 image of Japanese Shoes and a 45x283 image of a Stick of Eggs. Both images from "Big People and Little People of Other Lands" by Edward R. Shaw. The originals have a white background, but are reversed to show the image extent. This images are GIFs, but JPGs and BMPs images work exactly the same.

Images are not centered by default in MOBI/AZW, but images are typically explicitly centered in well designed ebooks. Here, the test images are not centered to make size differences more apparent.

[Japanese Shoes: GIF (308x59)]

[Japanese Shoes: GIF (308x59)]

All small images are displayed double size on the Kindle, but are displayed the original size on other devices.

[Japanese Shoes: GIF (150x29)]

[Japanese Shoes: GIF (220x38)]

[Japanese Shoes: GIF (250x48)]

[Japanese Shoes: GIF (308x59)]

The Kindle screen width for images in MOBI/AZW files is 525, so all images wider than 262 pixels end up full width.

[Japanese Shoes: GIF (260x50)]

[Japanese Shoes: GIF (262x50)]

[Japanese Shoes: GIF (265x51)]

[Japanese Shoes: GIF (450x86)]

[Japanese Shoes: GIF (525x101)]

[Japanese Shoes: GIF (924x177)]

Amazon DTP software forces images to be no larger than 450x550. If DTP is creating AZW (MOBI) files, all its images will be resized on the Kindle!

On the Kindle, images wider than 525 pixels are downsized to that width (there is no "zoom" mode for MOBI/AZW ebooks on the Kindle). On other devices, images wider than the screen are downsized but clicking on them brings up image mode with the full sized image.

The full size of MOBI/AZW images on the Kindle is 525x640, so all images taller than 320 pixels are full height. The aspect ratio of the image is preserved, so typically only one dimension is maximized (unless the aspect ratio of the image is 640/525, or about 11/9).

[Stick of Eggs: GIF (45x283)]

[Stick of Eggs: GIF (50x315)]

[Stick of Eggs: GIF (51x320)]

[Stick of Eggs: GIF (102x640)]

[Stick of Eggs: GIF (153x960)]