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What size is a YouTube Shorts thumbnail?
The YouTube Shorts thumbnail spec is 2160 x 3840 px recommended, 9:16; minimum height 640 px. Verified 2026-10-16 from the official YouTube page.
| Spec | Value | Source | Last verified |
|---|---|---|---|
| Custom Shorts thumbnail size | 2160 x 3840 px recommended, 9:16; minimum height 640 px | official page | Verified |
| Thumbnail file size limit | 2 MB on mobile; 50 MB on desktop Mobile podcast thumbnails: 10 MB. | official page | Verified |
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Quoted from YouTube's official page and dated; we don't use third-party guides. How we verify.