Type: Inflated rubber playground ball (commonly known as a "kickball"); Size: 8.5 to 10 inches (21.5 to 25.4 cm) in diameter; Material: Rubber or synthetic rubber; must be inflated and bouncy
Why people argue about this
People often assume that any ball will do in kickball, which leads them to bring their own rubber balls from home, forgetting that the official rule specifies an 8.5 to 10 inches diameter and bouncy red ball. This oversight can lead to disputes when a differently sized or colored ball is used, disrupting gameplay due to size variance affecting how far it travels and bouncing characteristics.
