The Amazon Main Product Image size (2000×2000px)
Amazon's main product image is the single most important photo in any listing, because it is what shoppers see in search results, in the buy box, and as the first frame of the image carousel. Amazon recommends the longest side be at least 1600 pixels, and 2000x2000 sits comfortably above that threshold so your listing qualifies for the hover-to-zoom feature that lets buyers inspect texture, stitching, and fine detail before they add to cart.
The square 1:1 ratio is deliberate: Amazon crops and frames every catalog thumbnail as a square, so designing at exactly 2000x2000 means your product fills the frame the same way in search, on the product page, and inside sponsored ad placements. Amazon also requires the main image to sit on a pure white background (RGB 255,255,255) with the product filling roughly 85% of the frame, no logos, watermarks, text, or props, so resize a clean, centered shot rather than a lifestyle scene.
Uploading a correctly sized 2000x2000 file also reduces the recompression Amazon applies, keeping edges crisp when the zoom viewer magnifies your product. If your original is larger, scaling down to 2000 on the long side is the sweet spot between sharp zoom and a fast-loading page. Amazon's catalog and category rules change over time and some categories have stricter requirements, so verify the current spec for your exact category before a bulk upload.