Images play crucial role in getting the attention of your site visitors. And when it comes to social media they become all the more important.

HubSpot’s Lindsay Kolowich has published a comprehensive guide to help marketers choose the right image size for their social media marketing campaigns.

Kolowich says, “When you’re selecting cover photos, shared images, and other social media assets, knowing the basic image dimensions might not cut it.

What if you want to make sure a certain part of your cover photo isn’t obstructed by your profile photo? And what’s the difference between shared link thumbnails, or in-stream photos — are the dimensions different for those?

As it turns out, sizing images correctly for social media is no simple task. Even just for Facebook marketing, photo dimensions vary according to where and how it’s shared — from cover photos, to timeline images, to profile pictures”.

Your Bookmarkable Guide to Social Media Image Sizes