What size and weight is needed fora soccer ball to be official?

The Size 5 ball is the official size used by FIFA. Following are the specifications -Circumference: 27 to 28 inches (69 to 71 cm)

Weight: 14 to 16 oz (400 to 450 grams)

Official pressure: between 8.5 to 15.6 PSI

Diameter: 8.6 to 9 inches (22 to 23 cm)

Radius: 4.3 to 4.5 inches (11 to 11.5 cm)