I spend a lot of time exporting various resolutions for social media and thought it might be helpful if I shared “part” of my cheat sheet for feeds. I say part, as I don’t want to make it overly complicated with profile and banner sizes etc. Keep in mind these do change over time and these specific resolutions are pulled from the social sites or my experience. If you’re having luck posting using at a different setting let me know I’d love to hear about it.
*A couple of notes to keep in mind: aspect ratio is length x height, which changes the crop. ie. 1×1 aspect ratio is a square vs. 16×9 is cropped like a movie screen, wider than taller. Also, these are all @72 ppi (pixels-per-inch) and exported to the sRGB color space, which is good for web-based applications.
LinkedIN Feed 1200×627 for landscape (horizontal crop.)
Facebook Timeline (accepts jpg + png:) 2048×1149 for landscape (horizontal crop) and then 2048 x 3072 for portrait (vertical crop) while a square crop would be 2048×2048.
Instagram Feed (accepts jpg, png, non-animated gifs + mp4s for animations) 1080×566 for landscape (horizontal crop) and then 1080×1350 for portrait (vertical crop) while a square crop would be 1080×1080.
Twitter Stream (accepts gif, jpg + png:) 1200×675. This is at the recommended aspect ratio of 16:9 which is the standard widescreen ratio.
Pinterest Boards (accepts jpg + png:) 2:3 is the recommended aspect ratio @1000×1500. I believe you can also post 1:1 @1000×1000 and then a “tall” pin @ 1:2.1 @1000×2100. I think the taller images crop in the feed.
Lastly, stories are the same for all channels @1080×1920 (this is a vertical crop FYI.)
I hope that helps and let me know if I missed anything!