How to change default page print size in chrome

Is it possible to change the default page print size in Chrome? I'm printing the webpage to a pdf file and it seems that the size is letter. I want to be able to change that to A4. Or if there are any chrome extensions that you know that will make this possible. I've seen one extension but it cannot print the page to pdf since what I'm trying to print is on localhost.

Instead of using the regular Print or Ctrl + P option, try using the Print using system dialog option Ctrl + Shift + P

You can then select the printer you wish to use, and click on Preferences to change the paper size and other printing options.