Question: what is the difference between a size 4 and 5 football?
Answer: Size 4 is designed for players aged 11 to 13 (Under 11,12, 13 and 14's). The ball should weigh between 350g -390g, with a circumference of 63. 5cm - 66cm. Size 5 is designed for use by players aged 14+ (Under 15, 16, 18 and above).