STRAUSS Official Football Size 3 |Professional Match Ball for Indoor & Outdoor Games & Training for Kids & Adults | Granular Texture with High-Performance Grained Surface, (Blue) PU Material - This football made of PU material. PU's abrasion resistance, lightweight, good strength and toughness are key technical advantages for its use in building and constructing the football. Air Retention - The football should be filled to 90% capacity only. It can retain the air well, so as to make sure that the air doesn't escape it easily. Size 3 - This football is a size 3. It is small in size and is constructed for kids. The diameter of the football is 20 cm with a circumference of 7.9 inch. Perfect for Training Purposes - The standard size and the exceptional balance of the ball along with the strong bladder makes it the perfect ball for training purposes.