What object is 30 mm long?

Answer 1

there are a million things 3cm long like bugs, some bones in your fingers, a piece of string or paper cut to that length, etc.

Answer 2

An object that is 30 mm long would be approximately the size of a standard AAA battery or a small paperclip. In terms of comparison, it is slightly longer than the width of a credit card, which is typically around 85.60 mm long. This length can be easily measured using a ruler or a digital caliper for precision.

Answer 3

30 mm is equivalent to 1.1811 inches.