With thanks to Make a Website Hub, this useful infographic shows all the correct sizes for images and video for the major social network platforms, updated for 2018.
Two new platforms are included this year - WeChat and Weibo - reflecting the growth of social media networks in China. As always, as well as the specific dimensions for each image, guidance is given on the right type of picture to use in a particular spot.
Definitely something to keep at hand!
Source: Make a Website Hub