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Updated for 2019.
Here are the height and width dimensions to note for giving your social media marketing the extra punch it needs.
For each, 72dpi RGB files (JPG, PNG, GIF) are acceptable.
Facebook
See Documentation
Post Photo
- Width: 600px (min) or 1200px (recommended)
- Height: 315px (min) or 630px (recommended)
- Note: this aspect ratio (4:3) can be made shorter, but otherwise fits snug as its scaled on various devices
Cover Photo
- Width: 828px
- Height: 313px
- Note: on mobile, only the middle 563px width is shown
Video
- Autoplay: automatic
- Muted: default
- Poster Frame: choose from selection or upload your own
- Closed captioning (see our page about this)
Newsfeed Post with a GIF
- Smaller than 8mb
- Loaded by an external URL
Instagram
Images
- Width: 1080px
- Height: 1080px
While images are shown squeezed to a 600x600 container (or smaller on thumbnail view), the social network is starting to store 1080x1080 files as of July 2015.
Stories
- Width: 1080px
- Height: 1920px
Horizontal content will be center cropped with no choice to adjust it within the app.
Video
- Length: 3 to 60 seconds (Source)
Fun fact: changed from 30 to 60 in March 2016
- Autoplay: automatic
- Muted: default
- Poster Frame: choose from selection
Twitter
Cover Photo
- Width: 1500px
- Height: 500px
Image ("Summary Card with Large Image" via Twitter Cards - Source):
- Width: 280px or larger
- Height: 150px or larger
- Filesize: 1mb or less
Video
- Length: 140 seconds or less (updated June 21, 2016)
- Autoplay: automatic
- Muted: default
- Poster Frame: first frame
Tumblr
Animated GIFs
- Width: 500
- Height: 500
- Filesize: 2mb
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