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#youtube-thumbnail

Practical guides for online sellers: product photos, marketplace listings, video ads and growing your store.

YouTube Thumbnail Size (2026): Dimensions, File Limits and Design Tips

Seller Guides Oct 11, 2026

YouTube Thumbnail Size (2026): Dimensions, File Limits and Design Tips

The current YouTube thumbnail dimensions, aspect ratio, file size limits and formats, what YouTube's overlays cover, and how to design thumbnails for product and review videos.

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Turn one phone photo into a full listing kit. 7 days free, 50 credits, no card.

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