Halo Waypoint has uploaded a video in a series about the Anatomy of Halo. Here is the first part.
One thing of note that I didn’t know before was the interior land width. In the video it was said to be 318 kilometers. That equated to 197.596 miles or 197 miles and 1049 yards.
To put that into perspective it is like going from New York City to Boston, approximately.