YouTube Thumbnail Dimensions
Recommended size: 1280 × 720 pixels
YouTube thumbnails are displayed at 1280×720 pixels with a 16:9 aspect ratio. A compelling thumbnail is the single biggest factor in click-through rate — YouTube's own Creator Academy states that 90% of top-performing videos use custom thumbnails. Thumbnails appear at vastly different sizes across YouTube's interface, from 168×94 in sidebar suggestions to full-width on TV apps, so they must be readable at every scale.
Specifications
| Width | 1280px |
| Height | 720px |
| Aspect Ratio | 16:9 |
| Platform | youtube |
| Category | video |
Thumbnail Display Sizes Across YouTube
Your thumbnail appears at radically different sizes depending on where it's shown:
- Home feed (desktop): ~360×202px
- Home feed (mobile): ~168×94px in grid, full-width in list view
- Sidebar suggestions (desktop): ~168×94px
- Search results: ~360×202px on desktop, variable on mobile
- End screens: ~140×79px overlaid on video
- TV apps: Up to full 1280×720
This huge range means your thumbnail must work at both tiny and large sizes. Test your design at 168×94 pixels — if you can still understand the subject and read any text, your thumbnail will work everywhere.
Design Principles That Drive Clicks
High-CTR thumbnails share consistent patterns:
- Large faces with exaggerated expressions — human faces trigger pattern recognition and emotional response
- High contrast and saturated colors — thumbnails compete with dozens of others on screen
- Maximum 3-4 words of text — short, punchy text at 60px+ font size that's readable at 168px wide
- Clear visual hierarchy — one dominant subject, not a busy scene
- Contrast with YouTube's white/dark interface — avoid pure white or very dark thumbnails that blend into the background
Avoid:
- Clickbait red arrows and circles (viewers have learned to distrust these)
- Tiny text below 48px equivalent
- Low-contrast images that look muddy at small sizes
- Duplicating the video title in the thumbnail — this wastes space since the title is always shown alongside
Technical Specifications
YouTube's thumbnail requirements:
- Resolution: 1280×720 pixels (minimum 640px wide)
- Aspect ratio: 16:9 (anything else gets black bars or cropping)
- File formats: JPEG, PNG, GIF, BMP
- Maximum file size: 2 MB
- Minimum dimensions: 640×360 pixels
YouTube displays a timestamp badge in the bottom-right corner of thumbnails. This badge typically covers roughly 80×20 pixels at display size. Avoid placing critical text or elements in the bottom-right corner where the duration badge will overlap.
For A/B testing thumbnails, YouTube now offers a built-in Test & Compare feature in YouTube Studio that runs experiments across your audience.
Quick Tips
- → Test your thumbnail at 168×94px — if it's readable there, it works everywhere
- → Keep text to 3-4 words maximum at 60px+ font size
- → Avoid the bottom-right corner where YouTube overlays the video duration
- → Use YouTube's Test & Compare feature to A/B test thumbnail performance
Frequently Asked Questions
What makes a good YouTube thumbnail?
A good YouTube thumbnail has a clear subject with high contrast, is readable at 168×94 pixels (sidebar size), uses 3-4 words maximum of large text, features an expressive human face when possible, and avoids clutter. Test your thumbnail at small sizes before uploading — if you can't tell what the video is about at 168px wide, redesign it.
What resolution should a YouTube thumbnail be?
1280×720 pixels at 16:9 aspect ratio. This is YouTube's recommended resolution and the maximum they display. The minimum accepted is 640×360 pixels, but always use the full 1280×720 for sharpness across all display contexts including TV apps.
Can I change a YouTube thumbnail after publishing?
Yes. Go to YouTube Studio, select the video, click the thumbnail area, and upload a new one. YouTube's Test & Compare feature also lets you A/B test different thumbnails against each other to find the highest-CTR option. Changes take effect within minutes.