Comment on CSS px is an Angular MeasurementparentComments−JoshTriplett14yUnfortunately, devices stopped actually making "mm" a millimeter long a while ago; for instance, various mobile devices scale "mm" by a factor of 2 because they assume that sites don't actually want a physical unit of measure.−kickingvegas14yIf you don't mind my asking: which devices?−JoshTriplett14yTake a look at http://robert.ocallahan.org/2010/08/css-units-changes-landed... for some of the details.
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Unfortunately, devices stopped actually making "mm" a millimeter long a while ago; for instance, various mobile devices scale "mm" by a factor of 2 because they assume that sites don't actually want a physical unit of measure.
If you don't mind my asking: which devices?
Take a look at http://robert.ocallahan.org/2010/08/css-units-changes-landed... for some of the details.