What is the minimum width and height Of Facebook Open Graph Images?

Question

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

Answer 1

From Facebook developers page:

Use images that are at least 1200 x 630 pixels for the best display on high resolution devices. At the minimum, you should use images that are 600 x 315 pixels to display link page posts with larger images.

You can find more details on this here. Please check point number 4