3.8 Discus and Hammer Circles (Technical Rules 34 and 36)

Discus: Internal diameter 2.500 m ± 5 mm. Throwing sector 34.92°.; Hammer: Internal diameter 2.135 m ± 5 mm. Throwing sector 34.92°. A protective cage must surround the throwing area to protect officials, athletes, and spectators (Technical Rule 37). The cage must be capable of stopping a 7.260 k...

Source: Rule 37

Send this to your friend — argument over.