Volleyball is one of the most successful and popular competitive and recreational sports in the world. It is fast, it is exciting and the action is explosive. Yet volleyball comprises several crucial overlapping elements whose complimentary interactions render it unique amongst rally games.
The ball shall be spherical, made of a flexible leather or synthetic leather case with a bladder inside made of rubber or a similar material.Its colour may be a uniform light colour, or a combination of colours. Synthetic leather material and colour combinations of balls used in International Official competitions should comply with FIVB standards.
Circumference of ball shall be 65-67 cm and its weight shall be 260-280 g. Inside Pressure shall be 0.30 to 0.325 kg/cm2 (4.26 to 4.61 psi) (294.3 to 318.82 mbar or hPa).
All balls used in a match must have the same standards regarding circumference, weight, pressure, type, colour, etc.