Another difference between NFL and CFL balls is that Canadian balls have two 1-inch (25 mm) complete white stripes around the football 3 in (76 mm) from the largest diameter of the ball and NFL balls have no stripes at all. The CFL retained its striping scheme when it adopted NFL measurement specifications in 2018.
Size 4 soccer balls are recommended for youth players ages 8 to 12. Size 4 balls measure 25-26 inches in circumference (63.5-66 cm) and weigh approximately 350-390 grams. Smaller than a size 5 adult ball, size 4 balls tend to be beneficial in the skill development of young players.