The most common size comparison of an acre is with a standard American football field, which is 6,400 square yards, or 1.32 acres. An acre is roughly the size of a football field without the end zones.
One acre is equal to 43,560 square feet. A one-acre area could be a rectangle 217.8 feet long and 200 feet wide, or it could be a square surface 208.71 feet long on each side.
A one-acre parking lot could fit about 150 cars. The White House sits on 18 acres of land, and the Ellipse, to the south, measures 52 acres. The base of the Empire State Building is two acres. Central Park covers 843 acres. Inside Central Park, the Strawberry Fields section is 2.5 acres.