YouTube Thumbnail Size & Best Practices for 2026 (Specs + Design Rules)
The current YouTube thumbnail size requirements (resolution, aspect ratio, file limits) plus design rules that still work when your thumbnail is the size of a fingernail.
Topic
design
YouTube Thumbnail Text: How Many Words, What to Say, and When to Use None
How much text to put on a YouTube thumbnail, what it should say so it doesn't repeat your title, how big it needs to be, and when the best choice is no text at all.