| Zalando | Portrait 1:1.44; best practice 1801 × 2600 px; minimum 762 × 1100 px (designer brands 1800 × 2600); JPG; sRGB; max 20 MB | No visible mannequins in mandatory packshots or model views. Low-quality or "unnatural" AI images are rejected. No visible on-image AI labels. Invisible AI marking (metadata or watermark) is strongly recommended, and Zalando lists it as required by December 2026 | Zalando image guidelines (updated 1 Oct 2026) |
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| Next | 3:4; minimum 1800 × 2400 px, preferred 2250 × 3000 px; 300 DPI; JPG; at least 4 images per style; at least one front model shot for clothing where possible; no logo on images | AI imagery is accepted as clean images with no visible labels or badges. The IPTC Digital Source Type field is mandatory on every image, and Next adds its own AI tag on site. Next charges £30 per item for a flat shot if a product arrives without images | Next imagery specifications · Next AI Image Compliance Guidelines (v2, Aug 2026) |
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| John Lewis | 800 × 800 to 7000 × 7000 px; JPEG preferred (TIFF accepted); portrait 3:4 as the main format (landscape main images are likely to be rejected); files named by EAN or stock number, with up to 10 alternates (`_1`, `_2`…) | Assets go through the supplier upload portal, not email or WeTransfer. On the marketplace, the main image must be a cut-out of the product on a plain background with no props, at least 1000 × 1000 px. The full style guide is available on request | JLP supplier image requirements · JLP marketplace rejection reasons |
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| Amazon (UK) | MAIN on pure white (RGB 255); the product fills at least 85% of the frame; at least 1,600 px in height; JPEG preferred | Adult apparel MAIN images on-model; kids' and baby items off-model. No visible or ghost mannequins on MAIN images | Amazon Clothing & Accessories seller imaging guide (Spring 2021). Check current rules in Seller Central UK → Product image requirements |
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| ASOS | ASOS shares partner image requirements during onboarding and doesn't publish a public spec. Integration partner ChannelEngine documents portrait images, a light grey background close to RGB 240, 2116 × 2700 px recommended (1500 × 1900 minimum), JPEG, sRGB, max 3 MB, and no text, banners or metadata | The "no metadata" line conflicts with AI-origin metadata that other channels require, so confirm with your ASOS contact how AI images should be marked | ChannelEngine ASOS marketplace guide (third-party; confirm with ASOS) |
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