Eco-Friendly Soccer Ball for Youth Targeted towards soccer players ages 9-12 of all skill levels, ages, & genders, Eco Sports’ new colorful design soccer ball made entirely of an eco-friendly material is now released in Size 4. This ball is the perfect ball for children, as they are able to take this versatile, durable ball to any soccer field, indoor or outdoor, while they are also able to play in any weather due to the weather resistant vegan exterior layer. Best Size 4 Soccer Ball This size 4 ball is 8.25” in diameter and 26” in circumference. Players of all genders of all skill levels are able to use this ball, and whether it's for a practice, game, or just a fun time in the summer with friends, this environmentally friendly soccer ball will guarantee a positive experience for both the player and mother earth.