New og:image size for Facebook share?

Facebook recently changed image sizes for ads, and link posts. This affects also to meta property="og:image". What is new optimal size for og:image at Facebook? The old version was square, now it doesn't fit anymore, because new size is rectangle.

Solution 1:

EDIT: The current best practices regarding Open Graph image sizes are officially outlined here: https://developers.facebook.com/docs/sharing/best-practices#images

There was a post in the Facebook developers group today, where one of the FB guys uploaded a PDF containing their new rules about image sizes – since that seems to be available only if you’re a member of the group, I uploaded it here: http://www.sendspace.com/file/ghqwhr

And they also said they will post about it in the developer blog in the coming days, so keep checking there as well

To summarize the linked document:

• Minimum size in pixels is 600x315
• Recommended size is 1200x630 - Images this size will get a larger display treatment.
• Aspect ratio should be 1.91:1

Solution 2:

Relying on the PDF that @CBroe posted earlier:

For best og:image results (retina ready & without being cropped) with the current Facebook Standard use:

Size: minimum 1200 x 630px

Ratio: 1.91:1