In 2026, the majority of Amazon shopping sessions begin on mobile. For most product categories, mobile sessions represent 60–70% of total traffic. This single fact should reshape your entire approach to Amazon listing images — particularly your hero image.
What a mobile thumbnail actually looks like
In Amazon mobile search results, your hero image appears at approximately 150×150 pixels. At this size, fine detail is invisible, small text is unreadable, and products that don't contrast clearly against white disappear. The mobile thumbnail is a silhouette test: can buyers identify your product at a glance?
The mobile thumbnail test
Download your current hero image. Resize it to exactly 150×150 pixels in any image editor. Look at it for 2 seconds. Can you identify the product? Does it stand out from a white background? Is the product clearly differentiated from competitors' thumbnails you've seen? If you hesitate on any of these, your hero image is losing mobile clicks.
Products that score 8–10/10 on our Mobile Thumbnail dimension see an average 22% higher CTR than those scoring 4–6/10, holding all other listing variables constant.
Mobile-first composition rules
Product must fill 85–90% of the frame (leaving white space kills mobile visibility), shoot from the angle that maximises the product's recognisable silhouette, ensure the product colour clearly contrasts against white background (add subtle shadow for white products), remove any props or secondary elements that compete for attention at small size.
The supporting image mobile test
Supporting images are displayed smaller on mobile but buyers do swipe through them. For infographics, the mobile minimum is 300×300 pixels of effective display. Run infographic callout text through a 300×300 crop test — if labels aren't readable, increase font size to minimum 18pt.