Rule 1: Covers may not include: i. images with more than 20% text;
Rule 2: Ads and sponsored stories for News Feed that originate from Pages may not include images with more than 20% text (effective January 15th, 2013)
Rule 1 only applies to those who have Facebook Pages, not Facebook Profiles. Don’t know the difference? Read this. Since Pages and Profiles can now both run ads, Rule 2 applies to both.
While most Subscribers are not using Facebook Ads, many have created Timeline Cover photos that resemble their business cards. Text may not cover more than 20% of the image, measured programmatically by Facebook on a grid system. Facebook uses an algorithm that lays a grid of 25 blocks over an image, if the image has text in 6 or more blocks, it fails and Facebook rejects the image. Poor Jessica has 15 blocks or 60% of her image is considered text.
You could say – “I’m not a graphic designer and/or I don’t have time to count blocks”
You’d be right and Facebook is in the process of releasing a tool to help businesses measure the text percentage of Cover photos and ads. Until then, here’s a great resource on how to measure the text in your Timeline Covers and Ads.