Have you ever had the thought, "How big is an acre of land"? I know I have wondered that very thing -- before I became a real estate professional. Now it is my job to know.
An acre is an area of land equal to 43,560 square feet. For visuality purposes, an acre is most often compared to the size of a football field - not counting the two end zones, which are each 30 feet in length.
Now try to envision one square mile. A square mile is equal to 640 acres.