How to show some posts only in fullwidth

I have many posts.
I have a request to show some posts in fullwidth, the others with side bar.
There is no attributes to choose fullwidth in post editing page.

How can I achieve my goal?

Hello there,

It seems like your question is similar with this one https://athemes.com/forums/topic/customized-post-needs-to-show-in-full-width/

Let me know if it doesn’t answer.

Regards,
Kharis