Dimension reference
1280×720px Image Size
2 platform formats use exactly 1280×720 pixels (16:9 aspect ratio). Resize your image once and use it across 2 platforms.
Width1280px
Height720px
Aspect ratio16:9
Platforms2
Platforms using 1280×720px
YouTube Thumbnail
YouTube
YouTube recommends 1280×720 with a minimum width of 640px. Must be under 2MB. Thumbnails display at many different sizes across YouTube's UI.
Vimeo Thumbnail
Vimeo
Standard 16:9 thumbnail for video previews. Vimeo auto-generates thumbnails but custom uploads look more professional.
Explore more 16:9 sizes: