Add contact form to side widget

I would like to add a contact form to the sidebar widget but when I do, it is too big. I saw on your site a ‘content sidebar’ where it appears you can adjust the size. I do not see the ‘content sidebar’. Where is that available?

Also, is there a way to link directly to a contact form that has been created?

Thank you.

https://wordpress.org/plugins/formidable/