Youtube Thumbnail Size 2025. Make sure to stick to the size guidelines to avoid cropping or scaling issues. Youtube won’t accept files that don’t.

Let’s break down the key aspects of youtube thumbnail dimensions to ensure your thumbnails look great across all devices and platforms. The best size for a youtube thumbnail is 1280 pixels wide by 720 pixels tall, with a minimum width of 640 pixels (and 16:9 for the resolution).