Disc golf discs are smaller than Ultimate flying discs or general-purpose recreational frisbees. They typically measure 21–22 centimeters (8.3–8.7 in) in diameter and weigh 130–180 grams (4.6–6.3 oz.). All PDGA-approved discs measure 21–30 centimeters (8.3–11.8 in) in diameter and weigh no more than 200 grams (7.1 oz.). Discs used for disc golf are designed and shaped for control, speed, and accuracy, while general-purpose flying discs, such as those used for playing guts or ultimate, have a more traditional shape, similar to a catch disc. There is a wide variety of discs used in disc golf and they are generally divided into three categories: drivers, mid-range discs, and putters.