How to set the font size for the title attribute?

I know hot to setup the header size: (add-hook 'org-mode-hook (lambda () (set-face-attribute 'org-level-1 nil :height 1))) But I don't know hw to setup the size of This is my title in #+title: This is my title in the beginning of my org files? Any idea how to target this element?

It's `org-document-title`

Thanks, seems to be working.

`M-x describe-char` at point.