Static pages are create exactly like blog pages. The only thing you need to add is a PAGE property. The exported path is relative to #+PUBLISH_DIR:.

You can also specify a custom template for your static page by adding a TEMPLATE property. The template path is relative to #+TEMPLATE_DIR:.

* Static page
   :PROPERTIES:
   :PAGE:     path/to/static/page.html
   :TEMPLATE: static-page.html
   :END: