Platform recommended
YouTube Thumbnail
YouTube's current recommended custom-thumbnail resolution and 16:9 ratio.
- Dimensions
- 3840 × 2160 px
- Aspect ratio
- 16:9
- Orientation
- landscape
16:9
Copy and use
Dimensions
3840 × 2160Ratio
16:9CSS
aspect-ratio: 16 / 9;Common uses
- YouTube thumbnail
- video thumbnail
AI generation working size
1280 × 720 px
This is practical generation guidance, not a universal model requirement.
Source and status
Platform recommended
Verified 14 August 2026
YouTube Help documentation