A product photograph needs to help someone understand what they are buying. File size matters because a catalogue can contain many images, but the smallest possible export may remove exactly the texture or lettering a buyer needs. Plan images around the product page, the listing grid and any zoom view. These are different uses, and they do not always need the same delivery file or the same crop.
Start by reading the requirements of your shop system or marketplace. Check allowed formats, minimum and maximum dimensions, aspect ratio, background instructions and any rules for the main image. This guide does not set requirements for a named marketplace. Rules change, and one platform’s advice should not be copied into another. Keep the original photographs so that a new channel does not require another photography session merely because its crop differs.
Photograph for useful information
Good preparation starts before compression. Use steady framing and consistent lighting so that the object is sharp and its shape is easy to understand. Clean the product and background where appropriate. Avoid distracting props that might suggest additional items are included. For used goods, show relevant wear rather than smoothing it away; a technically neat image is not useful if it creates the wrong expectation.
Capture a clear overview and purposeful details. A close view might show a fastening, material, connector or label. A second angle can explain depth better than a heavily sharpened front view. Choose images that answer likely questions instead of uploading many nearly identical frames. Fewer useful pictures can make a product page easier to understand and reduce the amount of imagery the visitor must download.
Set a consistent frame
Use a common aspect ratio across the catalogue when the design calls for it. Consistency helps a grid feel orderly, but it should not force a tall object into a cramped square or cut off an important attachment. Leave room around products that need it. If the shop crops thumbnails automatically, test the main image in the actual listing rather than only in a full-size preview.
Scale products honestly. Similar framing can make items look comparable, but it cannot communicate physical dimensions by itself. Show a suitable scale reference where permitted and give measurements in the product description. Do not enlarge a small item in one photograph and expect viewers to infer its real size from empty space. The image and the written specification should support each other instead of leaving an avoidable ambiguity.
Keep colour and texture credible
Compare the source and export for important colours, reflective surfaces and fine materials. Compression can smooth woven fabric, create ringing around lettering or flatten subtle differences in a finish. Inspect the areas that buyers use to judge the object. A thumbnail may hide those changes, while a product zoom makes them conspicuous. Test both views rather than choosing a setting only from the smallest preview.
Colour appearance depends on the viewer’s screen as well as your file, so do not promise an exact match on every device. Still, you can avoid obvious processing errors. Use a predictable delivery workflow and check the result in the shop. Be cautious when converting an HDR or wide-gamut source into an ordinary listing image. Retain the source so that a poor conversion can be corrected without editing the degraded export.
Choose dimensions by placement
A catalogue thumbnail and a detailed zoom serve different roles. Find out whether the platform generates its own derivatives from a master upload. If it does, upload an appropriate master within its guidance and inspect the generated versions. If you control the image files yourself, prepare versions for the actual display sizes instead of sending the largest camera original into every small product card on the page.
Do not upscale a small source just to satisfy a visual preference for large numbers. Added pixels do not guarantee real detail. If a minimum-size requirement cannot be met with a clear source, obtain a better photograph or consult the platform’s guidance. Equally, do not shrink a useful detail image so far that the zoom function becomes a larger view of compression defects rather than additional product information.
Export deliberately
Choose a format accepted by the shop. JPEG can be practical for ordinary photographs with a solid background. Transparency needs another suitable format or an intentional background replacement. WebP or AVIF may be useful where the platform supports the complete workflow, but do not assume every marketplace upload or downstream catalogue integration accepts them. A smaller file is not a successful handover if another system silently drops it.
Work from the original and compare a few representative exports before processing the catalogue. Include difficult examples such as reflective metal, fine lettering and textured cloth. A setting that works on a smooth box may fail on a detailed fabric. Record the chosen crop and export approach so that later products look consistent, but allow exceptions when the product needs more detail or a different composition.
Check the published listing
Inspect the main image, mobile grid, product page and zoom after upload. The platform may recompress the file, alter the crop or add a background. Verify the version shoppers actually receive. Check that the first image belongs to the correct variant and that colour swatches or alternate views do not point to another product. A technically valid file in the wrong listing is still a serious content error.
Finally, review filenames and embedded information for unnecessary private details, especially when photographs were taken at home. Preserve required attribution or rights information through an appropriate documented route rather than blindly stripping everything. Keep a private source archive and a clear set of delivery copies. The goal is a consistent, quick-to-use catalogue that shows the product honestly and gives buyers the details they need to decide.
A measured example
Our own test illustration combines colors, edges and fine noise. It is not a camera photo. The size of your own photo depends on its content.
JPEG, quality 90 → 65, measured with the documented sharp example generator: 85% smaller. Measurements and method