A frisbee is a gliding toy or sporting item that is generally made of molded plastic and measures roughly 8 to 10 inches (20 to 25 cm) in diameter with a pronounced lip. It is used recreationally and competitively for throwing and catching. The shape of the disc allows it to fly by generating lift as it moves through the air. Spinning the disc imparts a stabilizing gyroscopic force, allowing it to be both aimed with accuracy and thrown for distance.
A wide range of flying disc variants are available. Those for disc golf are usually smaller but denser and tailored for particular flight profiles to increase or decrease stability and distance. Disc dog sports use relatively slow-flying discs made of more pliable material to better resist a dog's bite and prevent injury to the dog. Flying rings are also available which typically travel significantly farther than any traditional flying disc. Illuminated discs are made of phosphorescent plastic or contain chemiluminescent fluid or battery-powered LEDs for play after dark. Others whistle when they reach a certain velocity in flight.