The diameter of a soccer ball varies according to the age of a player. In professional leagues the average ball is between 22 and 23 centimeters in diameter. Football Bible refers to this type of ball as Size 5.
Once soccer players reach the age of 12, a size 5 soccer ball is generally used in most games, including in high school soccer. In comparison, a size 3 soccer ball is used for young children up until the age of 8, while soccer players between 9 and 11 typically use a size 4 soccer ball. There are also size 1 and 2 soccer balls for young toddlers to play with.