The folks at Raidious have designed a great infographic, that lists the image specifications of 5 big social networking sites (Google+, Twitter, LinkedIn, Facebook and YouTube). Bookmark this "all in one social media specification infographic", so that, next time when you change your image you'll remember what size you should choose.
![Specification Guide For Social Networking Sites - #Infographic Specification Guide For Social Networking Sites [Infographic]](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_vpFlHx6XSV9CeZgL10L8VFSXWmftYZnfeJW6DKeqtanoRS6m7-sOibvk-5mS9SIAWkwk53BGdHcjpKZbGgmIc_Sg=s0-d)