STRAUSS Official Football Size 3 | Professional Match Ball for Indoor & Outdoor Games & Training for Kids & Adults | Granular Texture with High-Performance Grained Surface, (Red) 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. 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. 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.