Law 2 - The ball
The ball must be oval and made of four panels.
Length in line: 280 – 300 millimetres
Circumference (end to end): 740 – 770 millimetres
Circumference (in width): 580 – 620 millimetres
Leather or similar synthetic material. It may be treated to make it water resistant and easier to grip.
410 – 460 grams
5 AIR PRESSURE AT THE START OF PLAY
65.71-68.75 kilopascals, or 0.67 – 0.70 kilograms per square centimetre, or 9.5 -10 lbs per square inch.
6 SPARE BALLS
Spare balls may be available during a match, but a team must not gain or attempt to gain an unfair advantage by using them or changing them.
7 SMALLER BALLS
Balls of different sizes may be used for matches between younger players.