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Practical guides for online sellers: product photos, marketplace listings, video ads and growing your store.
16:9 Aspect Ratio (2026): Resolutions in Pixels, from 720p to 4K and 8K
Every common 16:9 resolution from 640x360 to 8K, where sellers need widescreen images, how to calculate 16:9 sizes and how to turn a square product photo into 16:9.
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YouTube Banner Size (2026): 2560x1440, Safe Area for TV, Desktop and Mobile
YouTube's official channel banner size, minimum size and 6 MB file limit, the safe area each device shows, and how to turn product photos into a banner that survives every crop.
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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