Warning: There's currently no reliable or recommended source of information about these averages.
All measurements should be of one single ball/testicle, not both of them. For the "Rundle and Sylvester, 1962" study, it is advised to use this website instead as it provides percentages based on age as well.
|Ellipsoid Approximation||4/3 × π × length/2 × height/2 × depth/2||18ml (0.61 fl oz)||12-30ml (0.41-1.01 fl oz)|
|Rundle and Sylvester, 1962||length × height × depth × 0.71||31.1ml (1.05 fl oz)||12-54.5ml (0.41-1.84 fl oz)|