New Sites Storage Info

  • Up to 200,000 characters per page,

  • 10,000 images per site,

  • and up to 1,000 pages

  • (max 10 million characters).

As far as I know Google has not provided any way for you to tell how many pages are on a site, how many characters are on a page/site or how many images are in the site.

New Sites—Although new Sites is included with Drive, your sites, and the content you embed in them, doesn’t count toward your Drive storage quota.

The above comment came from Google's support page. It has been changed. Please note that content that you store in Drive and then embed in a site does take up Drive space.

Learn more about Drive storage space.

Photos and other content added to a site is stored within that site (it's not added to Drive or any other Google products). Deleting a Site file also deletes the content within that site. Separate copies stored in Drive are not affected.