>If millimeters can be used for monorail vehicles which are 3150 mm wide and the
>girders which measure 8378 mm wide, why doesn't the clothing industry use
>millimeters since clothing measurements are much smaller than the monorail
>vehicles and tracks?  It doesn't make sense to use centimeters for clothing..

The issue isn't only the size, but also the precision required.  Being out by
half a centimeter in a clothes size isn't quite as disastrous
as being 5 mm out in a precision engineering project.

For that reason, it makes more sense to measure rails as 3150 mm than to
quote a person's height as 1700 mm.  Both are of the same order of magnitude,
whereas people's heights are rarely quoted more precisely than 1 cm.

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