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Glossary

Main Image

The main image is the first image displayed on an e-commerce platform — both in search results and at the top of the product page. It is by far the biggest single lever for CTR and a meaningful conversion factor as well. Shoppers decide in 0.3 seconds whether to click.

Amazon Style Guide for the main image

Amazon enforces strict rules. Violations get the listing suppressed.

  • Pure white background (RGB 255-255-255)
  • Product fills at least 85% of the frame
  • No text overlays, no watermarks, no stickers ("Best Seller", "New", "2-Pack")
  • No props other than the product itself (no hands, no table, no companion product)
  • No lifestyle scenes as the main image
  • Minimum resolution 1000×1000 px, 2000×2000 px recommended for zoom
  • JPG, PNG, GIF, TIFF accepted — no CMYK, sRGB only

Brand Registry owners get exceptions for clothing (models allowed) and some food (packaging may be shown).

What other platforms allow

  • Shopify: complete freedom. Lifestyle as the main image is allowed and often converts better than studio shots.
  • eBay: white background recommended, not enforced. Text overlays below 5% of the area are tolerated.
  • Etsy: lifestyle main images are the norm. The platform rewards styling and creative staging.
  • Google Shopping: white / solid background required, no promotional stickers, product in focus.
  • Otto: white background required for search results, lifestyle allowed in images 2–4.

Why the main image decides CTR

In an Amazon SERP you see 20+ listings simultaneously as thumbnails. The only thing distinguishing them is the main image. Shoppers scan without reading. If your image looks paler, smaller or less clear than the competition, they click another listing — even if your product is objectively better.

Concrete effects from Marketplace Pulse / Sistrix studies:

  • Listings with product-at-95%-frame: 30–50% higher CTR than at 60% frame
  • Listings with 4+ images (used as "main image from mobile carousel"): up to 35% higher conversion
  • Main-image A/B tests routinely produce 10–25% CTR shifts

How to optimise your main image

  1. Follow platform rules — never risk suppression
  2. Maximise product area — no wasted whitespace, product fills 85–95%
  3. High contrast — dark product against pure white works. Light product needs a subtle grey/cream shadow to separate from background
  4. Better angle — slight 3/4 profile beats front-on. More depth, more attractive
  5. A/B test — Amazon offers "Manage Your Experiments" for Brand Registry owners. Otherwise swap manually with date-tracked notes
  6. Mobile test — thumbnail in the mobile SERP. What looks great on desktop can disappear on mobile

Common mistakes

  • Lifestyle as main image on Amazon — policy violation, listing suppression
  • Text overlays ("SALE", "Best Seller", "NEW") — outright style guide violation
  • Watermarks with the brand logo — banned, looks amateur
  • CMYK images — render incorrectly with colour shifts. Use sRGB
  • Small product in the frame — wastes the click attention you fought for

Related terms

  • CTR — primary KPI for main image quality
  • Buy Box — Buy Box requires a style-guide-compliant main image
  • Conversion Rate — images 2–4 are the conversion lever
  • C2PA — labelling AI-generated main images from 2026 onward