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YouTube thumbnail size
Custom video thumbnail size: 3840 x 2160 px recommended, 16:9; minimum width 640 px. Verified 2026-10-16 from the official YouTube page.
| Spec | Value | Source | Last verified |
|---|---|---|---|
| Custom video thumbnail size | 3840 x 2160 px recommended, 16:9; minimum width 640 px | official page | 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 |
FAQ
What size is a YouTube thumbnail?
Custom video thumbnail size: 3840 x 2160 px recommended, 16:9; minimum width 640 px. Source: YouTube's official help page, last verified 2026-10-16.
What is the YouTube custom Shorts thumbnail size?
2160 x 3840 px recommended, 9:16; minimum height 640 px (official source, verified 2026-10-16).
What is the YouTube thumbnail file size limit?
2 MB on mobile; 50 MB on desktop (official source, verified 2026-10-16).
Where does this number come from?
It is quoted from YouTube's official page (linked in the table) and was last checked on 2026-10-16. We do not use third-party guides; see our methodology.