[Plugin: Easy Facebook Share Thumbnail] Recommended size

The minimum for facebook is 200×200 pixels. We enforce this restriction when featured images are defined, although we are working on a system to accept smaller images as well to make it easier (we would just upscale it to meet facebook’s requirement). If you find anything else out of the ordinary, kindly let us know here. We want to get to the bottom of all problems as soon as we can. Thanks! – HC WordPress Plugins