Fix facebook error og:Image not big enough on wordpress
The problem
You have installed the plugin "Facebook Open Graph Meta in WordPress" but even with the correct og:Image tag and a very big image facebook still complains that your image must be at least 200x200 px. This is very annoying since we could be providing very large image like 1200x800 and correctly point the og:Image tag to it and facebook still complains it must be larger than 200x200 !
Actual error:
Open Graph Warnings That Should Be Fixed
| og:image should be larger | Provided og:image is not big enough. Please use an image that's at least 200x200 px. Image 'http://django.yipp.ca/files/2013/10/vlcsnap-2013-12-09-20h29m47s92-520x245.jpg' will be used instead. |
The solution
Include your featured image in your wordpress post (or page), not only in the og:Image tag :
<img src="http://django.yipp.ca/files/2014/01/IMG_1474-house-moon.jpg" width="120" height="80" style="display:none;" />
Or you can fix this bug once and for all by editing your theme template (single.php) to include :
<?php if ( has_post_thumbnail() ) { $attr = array( 'style' => "display:none;", ); echo get_the_post_thumbnail($post_id, "full", $attr); } ?>
Trigger a re-fetch from facebook
After you made the change on your website, facebook might still post the wrong picture. I found that if you go on Open Graph Debugger tool and re-analyse your page, it will force an update and then the next time you share on facebook it will be correct.

I\'ve been struggling with issue for months. I\'ll give it a try and let you know if it works. 😉
What about Joomla site? I have the same problem, please help
You can use the first solution which is not specific to wordpress : Adding your image with style=\"display:none;\" and have it pointed by og:Image at the same time.