The image is too small
Low-resolution images can look blurry and may not support product-page zoom. A larger source image is safer than enlarging a small file.
Amazon product image guidance
Amazon image problems fall into two groups: files that cannot be processed and images that may trigger a listing-quality or policy issue after upload.

Low-resolution images can look blurry and may not support product-page zoom. A larger source image is safer than enlarging a small file.
An unreadable, damaged, oversized, or unsupported file may fail before Amazon can review the product image itself.
Amazon main images generally require a pure white background. Lifestyle settings are usually better suited to additional images.
Promotional text, logos, decorative borders, and watermarks can make a main image non-compliant even when its dimensions are correct.
Props or accessories can create confusion when they appear to be part of the purchase. Main images should represent the product accurately.
A product that is tiny, clipped, or pushed against an edge may perform poorly or conflict with category-specific presentation rules.
ImageCompat can check dimensions, aspect ratio, file size, format, transparency, and framing risk in your browser. It cannot reliably detect every background, watermark, prop, category, or marketplace-policy issue.
A square image is a dependable presentation choice, but shape alone does not decide whether Amazon will accept or suppress an image. Confirm the current source rules in Amazon's product image requirements.
Need the technical requirements first? See the Amazon image validator guide.