For most soccer players (over the age of 12), size 5 soccer balls are the standard, having a circumference of 27 to 28 inches. Younger (U8-U12) soccer players often play with a size 4 soccer ball. Only the youngest soccer players use size 3 soccer balls. Mini or skills soccer balls are considered to be size 1 or 2 soccer balls. They can be used for footwork development. A size 5 soccer ball is standard for almost all adult soccer players. Size 5 soccer balls are what professional soccer players around the world use. It’s also a good idea to check with your team’s officials to make sure.