Sometimes, one image size doesn't fit all. The 2016 Social Media Image Sizes Cheat Sheet from Hub Spot will help you optimize your images for all of your social media sites.
When you're designing cover photos, graphics, and other social media assets, sometimes knowing the bare bones image dimensions isn't enough.
What if you wanted to place text or an arrow on your Facebook cover photo without it getting covered by the profile photo? And what about the shared link thumbnails on Facebook or in-stream photos on Twitter ... how big should those be?
These change so often, a current infographic guide like this is always helpful.