Pool is played on a six pocket table. Modern pool tables generally range in size from 3.5 feet (1.07 m) by 7 feet (2.13 m), to 4.5 feet (1.37 m) by 9 feet (2.74 m).
The balls range from 2.25 inches (57.15 mm) in diameter to 2.375 inches (60.33 mm) in diameter.[5] Under the WPA/BCA (see below) equipment specifications, the weight may be from 5.5 to 6 oz. (156–170 g) with a diameter of 2.25 in. (57.15 mm), plus or minus 0.005 in. (0.127 mm). Modern coin-operated pool tables generally use one of three methods to distinguish and return the cue ball to the front of the table while the numbered balls return to an inaccessible receptacle until paid for again: the cue ball is larger and heavier than the other balls, or denser and heavier, or has a magnetic core.