At Step 4, Photos & Media, the Cover Photo help text gives it exactly: “Recommended size: 1920 × 1080 px (16:9). JPG, PNG, or WebP.”
This image becomes the listing’s featured image — the one shown in search results and on cards, so it is the first thing anyone sees of you.
What makes a good one
- The actual place or product, photographed in daylight.
- Wide rather than tall — anything else is cropped.
- No text across it. It is displayed at many sizes and text becomes unreadable.
- Not a stock photo. People recognise them, and they cost you trust.