Well executed One Pager by Peter Assentorp providing all the possible social media image/video sizes including Photoshop, Sketch and Adobe XD template files. Cheers Pete!
SocialSizes 2.0 includes template download for all networks in one file. You can also see sizes and download separately for Facebook, Instagram, Twitter, Snapchat, YouTube, Pinterest, Twitch, TikTok and more. Sizes are updated as soon as I know about a change.