Ball

In response to the mildly curious question of p (http://pomxpom.blogspot.com/2006/07/soccerball.html), the ball for a soccer game is simply a BALL! Or you may call it a soccer ball.

According to the Soccer 101 (http://worldsoccer.about.com/od/betweentheposts/a/startsoccer.htm) -
"Any piece of spare ground and any type of round ball being good enough for a kick-about."

A little more details on the equipment required (http://worldsoccer.about.com/cs/coach/a/equipess.htm) -
Soccer Balls
FIFA, the World Federation, specifies the regulation size and weight of balls to be used in matches organised under the official rules. But in youth and minor leagues, local rules often apply.
Soccer balls come in three sizes : 3, 4, 5 - and are made from different types of material.