["Social Media: Best Image Sizes" was first published on April 22, 2015]
The following is a guideline for best social media image sizes, based on several online sources.
Header image: 851px X 315px
Post image: 470px X 470px or 470px X 246px or 281px X 394px
The square and landscape image will be resized to a width of 470px and the height will adjust proportionally. The portrait image will be resized to a height of 394px and the width will adjust proportionally.
Header image: 2120px X 1192px
Post image: 426px X 213px. The image will be resized to a width of 426px and the height will adjust proportionally.
Header image: 204px X 204px or 409px X 409px
Feed image: 510px X 510px
Thumbnail: 161px X 161px
Header image: 1600px X 375px
Post image: 698px X 400px
Thumbnail: 180px X 110px
Feed image: the width will resize to 236px and height will adjust proportionally.
Expanded image: the width will resize to 736px.
Header image: 1500px X 500px
Tweet image: 599px X 358px
Summary card with large image: images are scaled to fit a width of 480px.