ITTF Rules
🏛️Official — ITTF2.3 The Ball (Law 2.3)
Verdict
The ball shall be spherical, with a diameter of 40 mm (1.57 in).; The ball shall weigh 2.7 g (0.095 oz).; The ball shall be made of celluloid or similar plastics material and shall be white or orange, and matt.
Source: Law 2.3
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