Last updated: October 2026
Most people watch Shorts by swiping, so it's easy to assume the thumbnail doesn't matter. Then you open a channel page, and there's a grid of small vertical previews, each one a chance to get a tap or lose it. That's where the thumbnail does its work. So two questions come up again and again: what size should it be, and how do you set one at all?
The short answer: a Shorts thumbnail is vertical, so use a 9:16 shape. The recommended size is 1080 x 1920 pixels, the same as the video itself. You can always pick a frame from your own video as the thumbnail. Uploading a separate custom image is being rolled out in stages, so check whether your own YouTube Studio shows the option.
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| Shorts thumbnail size at a glance |
Below you'll find the size, the three ways to set a thumbnail, a few design habits that suit vertical video, and the mistakes worth avoiding.
What size is a YouTube Shorts thumbnail?
Shorts are vertical videos, so their thumbnails are vertical too. Here is how that compares with a regular video:
| Type | Shape | Recommended size (px) |
|---|---|---|
| YouTube Shorts | 9:16, vertical | 1080 x 1920 |
| Regular YouTube video | 16:9, horizontal | 1280 x 720 |
If you also make long videos, our guide to YouTube thumbnail size and aspect ratio covers the horizontal version in detail.
Can you add a custom thumbnail to a Short?
This is the part where guides disagree, and the reason is that YouTube has been changing it.
- Choosing a frame from your video has been possible in the mobile app while uploading.
- Uploading a separate image has started to appear for creators. Reports say it began with creators in the YouTube Partner Program and verified accounts, and has been spreading to more accounts since.
Because it depends on your account and your region, the safest test is your own screen. Open the details page of a Short in YouTube Studio. If there's an Upload thumbnail button, you have it. If not, use one of the other two methods below.
Method 1: Pick a frame while uploading
- Record or select your video in the YouTube app and move on to the final details screen.
- Tap the thumbnail edit option, which is usually a pencil icon on the preview.
- Drag the selector along the timeline until you find a clear, interesting frame.
- Tap Done and publish.
Button names can change when the app updates, so follow the labels on your screen rather than this exact wording.
Method 2: Upload a custom image in YouTube Studio
If your account has the feature, this is the cleanest option.
- Open YouTube Studio and go to Content.
- Switch to the Shorts tab and find your video.
- Open the video's details page and scroll to the Thumbnail section.
- Click Upload thumbnail, choose your 9:16 image, and save.
Method 3: Design a frame inside the video
This is the older workaround, and it works for everyone. Make a vertical image with your keywords, place it as the first moment of your Short, then select that frame as the thumbnail. Keep it very brief so viewers don't swipe away, and make sure it matches what the Short really shows.
Design tips for vertical thumbnails
.png "main subject in the middle") |
| Subject in the middle |
- Keep the main subject in the middle. Buttons, captions, and the channel name sit over the edges of a vertical video, so don't hide anything important at the top, bottom, or right side.
- Use a few big words, or none. Three to five words is plenty. If the picture already says it, skip the text.
- Pick a sharp frame. A blurry, mid-motion frame looks careless in a small preview.
- Push the contrast. Light text on a darker area, or the other way round, stays readable at small size.
- Expect different crops. A Short can be shown in different shapes in different places on YouTube, so a centred subject survives better than one pushed to the edge.
For more general design habits that work for any thumbnail, YouTube's own thumbnail help page is worth a quick read.
Common mistakes to avoid
- Uploading a horizontal image. A 16:9 picture gets cropped or leaves empty space on a vertical canvas.
- Putting text at the very bottom. That's where the interface is most likely to cover it.
- Promising something the Short doesn't deliver. It may win a tap, but viewers swipe away fast, and it hurts trust.
- Assuming every account has the upload button. If you can't see it, it isn't a bug on your side. It just hasn't reached your account yet.
Frequently asked questions
What is the best size for a YouTube Shorts thumbnail?
The recommended size is 1080 x 1920 pixels in a 9:16 vertical shape.
Why can't I upload a custom thumbnail to my Short?
The feature is being released gradually, and it can depend on your account type and region. Check the Thumbnail section in YouTube Studio, and use frame selection if the upload button isn't there.
Can I change a Short's thumbnail after publishing?
If your account has the Studio upload option, you can change it from the video's details page. If it doesn't, you may only be able to choose a frame while uploading.
Do Shorts thumbnails matter if people watch in the feed?
Yes. They still appear on your channel page and in other places where a Short is shown as a preview.
Is a Short thumbnail the same size as a normal video thumbnail?
No. A normal thumbnail is 16:9 (1280 x 720), while a Shorts thumbnail is vertical 9:16.
Wrapping up
Design a Shorts thumbnail in a vertical 9:16 shape at 1080 x 1920, with the subject in the centre and only a few bold words. Use frame selection if that's all you have, and the Studio upload if your account offers it. For more guides like this one, visit the blog, and if you're also working on long videos, our YouTube title generator can help you pair a good title with your thumbnail.