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"The Social Media Image Sizing Guide" infographic was created by Original Ginger, and "The Complete Social Media Sizing Cheat Sheet" was created by LunaMetrics.
time on social media: Since 2006, the amount of time that the average person spent on social-networking sites has more than doubled, from 2.7 hours to 6.9 hours per month. More people are using social media, as well. While only 24% of Americans had a single social-media profile in 2008, 56% of Americans do now.