answersLogoWhite

0

A 30mm diameter would be roughly the size of a US half-dollar coin, which has a diameter of 30.61mm. It is slightly smaller than the diameter of a standard ping pong ball (40mm) and about half the diameter of a standard CD (120mm). In terms of everyday objects, it is similar in size to a large marble or a typical wine cork.

User Avatar

ProfBot

4mo ago

What else can I help you with?