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A regulation table tennis ball has a specified diameter of forty millimetres

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Assortment of 40 millimetre table tennis balls
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40 mm

A regulation table tennis ball has a specified diameter of forty millimetres

ITTF Law 2.3.1 specifies a spherical ball with a diameter of 40 millimetres. The neighbouring laws specify a mass of 2.7 grams and a matt white or orange surface.

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