adidas Performance Messi Soccer Ball, Black/Solar Green, Size 4 Harness the power of legendary player Leo Messi with the Messi soccer collection Messi is a forward for FC Barcelona and the Argentina National team, and has won the FIFA world player of the year award Machine stitched construction and internal nylon wound carcass for maximum durability and long-lasting performance Butyl bladder for best air retention to keep the ball's shape and stay inflated longer Size 3 ball suggested for ages 8 and under; size 4 ball suggested for ages 8-12; size 5 ball (official size) suggested for ages 12+. Size 1 is a mini ball. Check with your local league for size requirements.