Image size is measured in pixels, not inches or DPI — DPI is meaningless on screens. Two things matter: the total pixel dimensions (how sharp and how zoomable the image is) and the aspect ratio (the shape). Get both right once and the same files work across every marketplace.
What each platform wants
| Platform | Minimum | Recommended |
|---|---|---|
| Amazon | 500 px longest side (1000 px for zoom) | 1600 px+ |
| Shopify | — | 2048 × 2048, square |
| Walmart | 1000 × 1000 | 2000 × 2000+ |
Notice the overlap: a single 2000×2000 square image clears every minimum, hits Amazon's zoom threshold, and is close to Shopify's ideal. One size, every channel.
Why square (1:1) is the safe shape
Marketplaces display product images in square or near-square containers. If you upload a tall or wide image, the platform crops or letterboxes it — and you lose control of what's shown. A square image fills the frame predictably on search grids, product pages, and mobile. That's why 1:1 is the default for serious sellers.
Why 2000×2000 specifically
- Zoom that converts. Above ~1600 px, Amazon enables hover-to-zoom. 2000 px clears it with headroom, so shoppers can inspect texture and detail — and inspected products sell better.
- Retina-sharp. High-density phone and laptop screens render 2000 px crisply; smaller images look soft.
- Future-proof. It's large enough to downscale cleanly for thumbnails without ever needing to upscale (which adds blur).
- Universal. The same file uploads to Amazon, Shopify, Walmart, eBay and Etsy without re-exporting.
Bigger isn't automatically better — past the platform maximums (Amazon caps at 10000 px) you just add file weight that slows your page. 2000×2000 is the balance point: sharp, zoomable, fast.
Resolution mistakes that cost sales
- Uploading under 1000 px — no zoom, and a soft image on modern screens.
- Upscaling a small photo to fake resolution — it just looks blurry and "stretched."
- Non-square crops that get auto-cropped, cutting off part of the product.
- Heavy, uncompressed files that slow page load and hurt both ranking and conversion.
- Inconsistent sizes across the gallery, so images jump in scale as buyers swipe.
The simple rule
Export every product image as 2000×2000, square, sRGB, JPEG, with the product consistently framed. Do that and you'll meet Amazon's requirements, satisfy Walmart and Shopify, and never re-size per platform again.
Get the size right without thinking about it
Seller Studio outputs every image at exactly 2000×2000 by default — the full 8-image pack, perfectly square and consistent — from a single product photo or video. No export settings, no resizing, no guesswork. See how many images you need or browse real packs.