[ASUfool]

Why not use shotput-sized? 4.33 to 5.12 inch diameter [0]

0. https://www.topendsports.com/resources/equipment/ball-size.h...

[diputsmonro]

I would imagine that more people are familiar with the size of DVDs than shotputs.

As a telling piece of evidence, the header image in the article you linked doesn't even include one.