title: What is the Fb.ui feed picture size limits?
body: <p>I'm using the <a href="https://developers.facebook.com/docs/reference/dialogs/feed/" rel="nofollow noreferrer">Fb.ui feed</a> and I'm trying to find the picture size limits/requirements. Not all of my images appear using the feed, and I'd like to know exactly what the image requirements are. This is not well documented. </p>