sorry i press the wrong words the anwer is gram
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A gram is a measure of mass, not of length! I would use a centimetre.
I would use feet and inches.
Cm .
A kilometre.
Centimeters
Centimeters
Time
meeters?
a millimeter
Millimetre.
Milligrams
Kilometres
the metric system
Inches, millimetres or centimetres.