Is 1mm big?
A mm is not big, it is small. If you dont know mm, maybe you know inches. A mm is one twenty fifth of an inch. There are 2.5 centimetres in an inch, and 10mm to each cm, therefore approx 25 mm to an inch, and maybe just as thick as your fingernail.
Likewise, What object is one millimeter long?
Small units of length are called millimeters. A millimeter is about the thickness of a plastic id card (or credit card).
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