What is the optimal size of images for sharing a page in social media? networks Facebook, Vkontakte?

Question

Facebook

Nowhere can I find a manual on the optimal size of og:image for sharing a page in social. networks (facebook, vkontakte). Tell me what size should the image be, and how is it cropped for different recording formats?

Answer 1

For Facebook , for VKontakte .

Answer 2

VKontakte: 100x63px

Answer 3

I found a useful article here, all sizes in one place: tilda.education/articles-images-for-social

Answer 4

Now something has changed again:
https://developers.facebook.com/docs/sharing/best-...

Answer 5

Current info on facebook and vkontakte .
If you regularly have to create images from scratch, then I recommend making templates in Canva , make your life easier right away )