The right image size on YouTube can make all the difference between someone clicking on your video—or scrolling right past it. Here, we’ll guide you through the optimal formats for thumbnails, banners, and everything in between.
Updated: March 26, 2020
YouTube is a platform where visual content determines whether viewers stick around—and the right image format matters more than many people realize. Whether you’re uploading a thumbnail, designing a channel banner, or creating an end screen, you need the right dimensions.
A pixelated thumbnail or a cropped banner can make even high-quality video content look amateurish.
In this guide, we’ve compiled the latest recommendations for 2026. We cover everything from optimal thumbnail dimensions to how to ensure your channel banners, profile pictures, and end screens look sharp on all devices.



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