A United States dime coin is 1.35 mm thick. See related link.
There is only one metric system. The relevant units, within that system would be millimetres.
The thickness of a dime
The thickness of the US dime is 1.35 millimeters. That's the same as 0.00135 meter, or 0.00000135 kilometer. You could use whichever of those you like, to remember the thickness of a dime or discuss it with other people. They're all correct. But the millimeter produces the most convenient number.
You would use millimetres.
The mass of any coin is typically measured in grams; the capacity or volume would be measured in millilitres.
what is a thickness of a dime in metric measurements?
There is only one metric system. The relevant units, within that system would be millimetres.
millimeters
It is 1.35 millimetres thick.
either a decimeter or a millimeter...
No, a dime is closer to .045. But that will also depend on how old the dime is. An old dime will not have the same thickness as a new dime.
The actual thickness of a dime is between 1.35 and 1.40 mm.
A US dime has a thickness of 0.135cm
The thickness of a dime
Thickness of a dime
dime -- 17.9 mm diameter, 1.35 mm thickness
A US dime has a thickness of about 0.0531496 inch.