Why 'too small' happens
Amazon needs at least 1000px on the longest side. Images saved from websites or messaging apps are often shrunk well below this.
How to fix a too-small image
Go back to the original, full-resolution photo and re-export it at 1000px+ (1600px+ is better). Avoid upscaling a small file.
Frequently asked questions
What does 'image too small' mean on Amazon?
Your image is below the 1000px minimum on its longest side.
Can I just enlarge a small image?
Upscaling rarely looks good and can still be flagged for quality.
What size should I export at?
At least 1000px on the longest side; 1600px+ for the best quality.