View Here : Diameter Size Chart
Fashion can be sized according to different measurements, so be sure to select your size based on the Fit Guide found beneath the image on the product page. For example, if the Fit Guide is "Fit by Bust," use your bust measurement to locate your proper size in the HSN size chart.
The following are the specifications of an official size 5 soccer ball: 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)