SIZE & WEIGHT:
All 8 balls shall be identical in size and weight. Tournament grade Bocce ball sets are available with 100 mm to 115 mm diameter balls. Bocce Standards Association has chosen the International Standard ball diameter of 107 mm (4.2 inches) and weight of 920gms. (2 lbs.) as the standard size.
http://www.bocce.org/rules.html
.... Players may throw each Bocce in one of three ways:
A Punto, or point throw, has the goal of directly making a point. The throw is aimed at the Pallino and attempts to seat the Bocce as close to the Pallino as possible without hitting other Bocci along the way. The ultimate throw is one that seats the Bocce touching the Pallino—this is called a Baci (kiss) and is worth two points if it remains in place at the end of the Giro.
A Raffa is a throw aimed at another Bocce in order to move that Bocce out of the way.
A Volo, an aerial throw, is aimed to move another Bocce or the Pallino ....
