Indesign - how to set up a page for printing with crop marks

I received the request to make a project with Indesign. 300px width 100px height.

This project should have the crop marks on the corners.

Questions: 1) If I want to have those crop marks, should I create the project of the exact width that I was requested (300x100) or it should be bigger? 2) If it should be bigger, how much bigger should the project be?