YouTube Thumbnail Sizes and Best Practices (New for 2019)
TechSmith Camtasia
JUNE 17, 2019
Of course, it’s a good idea to have a great video behind the thumbnail. First, let’s start with the exact size you should make your YouTube thumbnails! The ideal thumbnail size is 1280 × 720 pixels with a minimum width of 640 pixels, and the ideal ratio for YouTube players and previews is 16:9.
63 
Let's personalize your content