Are you developing something for multiple social networking platform? You must have been puzzled with the image resolution each of them are using for avatar and user uploads.
It seems as though every other week a popular social media platform makes a large change in layout presentation, meaning all of your graphics you worked so hard to perfect for your company's page become obsolete or disappear from your page completely.
Here is a default custom graphics resolution used by the most popular social media websites on the internet. You should keep it with you for a reference.