Could we create a Template for Posts?

Now, like with the pages, with wordpress we can choose between several templates each time we post content as a post (not as a page). I really like the way we offer pressbooks the content, but with tables we have some limitations. Maybe we could create a template for post with the content area twice bigger as the current area. In that way, if the center of the post is a table (not really offten, but some times happen to me ) or a draw, we will have no problems.