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

Just follow these rules:

1. "Use images that are at least 1200 x 630 pixels for the best display on high resolution devices."
2. "Try to keep your images as close to 1.91:1 aspect ratio as possible to display the full image in News Feed without any cropping."
3. The preferred width of an image is 1500px

Adhering to the above principles, the preferred image has a width of 1500px, and a height of 786px (which preserves the 1.91:1 aspect ratio).

Source: Facebook: Sharing Best Practices