E-commerce Product Image Sizes: How to Prepare Photos That Marketplaces Accept

Step-by-step

1. 1

   Learn the general norms before touching a single pixel

   Most marketplaces converge on a few conventions even though exact numbers differ by platform and change over time. Square (1:1) is the most widely accepted main-image ratio; some fashion-focused platforms prefer a taller 4:5 portrait frame. For zoom to activate, listings generally need at least around 1,000 pixels on the longest side, and many platforms recommend substantially more — 1,500 to 2,000 pixels is a comfortable range that keeps zoom crisp. Main images are usually expected on a plain white or very light background, with the product filling most of the frame. Finally, every platform enforces a file-size ceiling, typically somewhere in the single-digit megabytes. Treat all of these as ranges, not gospel: before a bulk upload, open the marketplace's current image specification and confirm the exact ratio, minimum pixels, and size limit it enforces today.

2. 2

   Always start from the largest original you have

   Cropping and compression both discard information, so the order of operations matters: begin with the camera original, not a file that has already been through WhatsApp, a website download, or an earlier compression pass. Downscaling a large, clean source produces sharper results at any target size than upscaling a small one — upscaling cannot recover detail that was never captured. If your only copy of a photo is smaller than the marketplace minimum, reshooting almost always beats enlarging. Keep the originals in a separate folder and treat every export as disposable; you will re-export sooner or later, whether for a new platform, a new ratio, or a tightened size limit.

3. 3

   Crop to the target ratio first

   Open the photo in the Crop tool and lock the aspect ratio to your target — 1:1 for a square listing, 4:5 for portrait. Center the product, leave a consistent margin of empty background around it (a common habit is roughly 5–10% of the frame on each side, so the product never touches the edges), and keep that framing identical across your whole catalog. Consistent margins are what make a product grid look professional; a catalog where one item fills 95% of the frame and the next fills 60% looks careless even when every individual photo is good. Crop before resizing, not after: cropping a resized image throws away pixels you may need to stay above the zoom minimum.

4. 4

   Resize to the target dimensions — downscale only

   With the ratio fixed, use the Resize tool to bring the image to its final pixel dimensions. Pick a single target per platform — for example 1600×1600 for a square listing — and export everything at exactly that size rather than uploading a mix of dimensions and letting the platform scale them inconsistently. Never scale up past the original's resolution to hit a minimum; an upscaled photo passes the pixel check but looks soft the moment a buyer zooms in, which defeats the entire point of the minimum. If the marketplace publishes both a minimum and a maximum, aim comfortably inside the range instead of riding either limit.

5. 5

   Pick the format by content, not habit

   Product photographs — anything shot with a camera — should be JPEG: photographic gradients compress efficiently and every marketplace accepts it. Reserve PNG or WebP for graphics that contain hard edges and text: size charts, measurement diagrams, packaging renders, infographic-style secondary images. JPEG's compression visibly smears sharp text edges, while PNG keeps them exact and lossless WebP keeps them exact at a smaller size — if the platform accepts WebP uploads, which many still do not. When in doubt for an upload target, JPEG for photos and PNG for graphics is the combination that works everywhere.

6. 6

   Compress under the ceiling, then inspect

   Run the export through the Image Compressor to get well under the platform's file-size limit — being close to the ceiling risks rejection if the platform measures size differently than your OS does. After compressing, actually look at the result at 100% zoom before uploading: check fabric texture, fine patterns, and any edges between the product and the white background, because those are where over-compression shows first as blockiness or halos. If artifacts appear, raise the quality setting one notch and re-export; the difference between an ugly and a clean compression is often a few percent of file size.

7. 7

   Prepare 1x and 2x variants for your own store

   Marketplaces want one large upload and handle scaling themselves, but on your own website you control delivery — and high-DPI screens make a single size the wrong answer. Export each image twice from the same master: once at the CSS display size (1x) and once at double those dimensions (2x), then serve them with the srcset attribute so sharp screens get the sharp file and ordinary screens do not pay for pixels they cannot show. Name the files predictably — product-800.jpg and product-1600.jpg — so the pairing stays obvious months later. The 2x file is the one to compress more aggressively: at double density, compression artifacts are far less visible per screen pixel.