Facebook
Facebook page
Profile 170 x 170px on desktop, 128 x 128px smartphones
Cover photo 820 x 312px on desktop, 640 x 360px smartphones
Facebook posts
Sizes 1200 x 630px
Sizes 1200 x 1200px
Facebook stories
Sizes 1080 x 1920px
Facebook ads
Facebook feed ads 1080 x 1080px
Instagram
Instagram profile picture
320 x 320px
Instagram posts & image ads
Landscape 1080 x 566px
Portrait 1080 x 1350px
Square 1080 x 1080px
Instagram stories & stories ads
size 1080 x 1920px
Youtube
Youtube page
Profile picture 800 x 800px
Banner image 2560 x 1440px with aspect ratio 16:9; max file size 6mb
Youtube video
size 1280 x 720px