Quick: how big is the header image on a Twitter profile?
While you can upload any shape image up to 5MB in size, Twitter recommends dimensions of 1252 x 626 pixels. But here’s the thing: whatever you upload will be re-sized to 520 x 260 pixels, so it needs to look good at those specs, too, and not just at your original scale and shape.
Whether you’re brand new to social media or a savvy, seen-it-done-it-all veteran, working out the heights and widths of all those images you need to make your favourite social media channels look good is a time-consuming and, it’s fair to say, laborious process. Even worse: next time you have to do this, I guarantee that you won’t remember anything.
Help is at hand via this infographic from InfinPixels below, which provides a quick snapshot of dimension info for the main images on Facebook, Twitter, Google+ and Pinterest.