An acre is a unit of measurement that describes the length and width of a square of land. Each acre is composed of an area of 16x16 squares, totaling 256 squares each. This concept was most prominent prior to Wild World where acres locked camera movement and were used to navigate the town map. Acres are additionally used for determining random placement of objects at the start of the game as well as perfect town ratings which require the right amount of trees per acre, and flowers per acre.