I had read that images associated with a given URL in the Facebook open graph had to be greater than 50 x 50
However, when we ran the Facebook Object debugger - we g
Looks like they updated their docs:
The picture must be at least 50px by 50px (though minimum 200px by 200px is preferred) and have a maximum aspect ratio of 3:1
developers.facebook.com/docs/reference/dialogs/feed