>But you can't do that for meters, whereas you can for feet- and I only need to remember one body part for one inch (and one for one foot, naturally) whereas yo

>But you can't do that for meters, whereas you can for feet- and I only need to remember one body part for one inch (and one for one foot, naturally) whereas you have to remember several because the centimeter is too small, and the meter too big, to use in this way (you cannot even really generate 1 cm- so you have to do multiplication every time you want to do this). I never had to measure anything with my fingers or other body parts. I don't know what the point of that is. Being off by an accumulated error of 5 mm is often inaccurate enough that you failed and have to redo things. I don't have to remember "several", because kilometers, meters, centimeters, millimeters are just meters with zeroes to the left or the right of the comma. The thing is, Americans use their own nonstandard metric system. They use metrics like thousandths of an inch, which is just 0.0254 mm or as big as 25.4 micrometers. Thousandths makes things sound smaller than they really are. Then you realize it's just 1/40 of a millimetre and it sounds really big at that point and the engineering profession shows it, by having another unit. Ten thousandths of an inch. Wow, amazing. We have almost reached parity with the micrometer! The average Joe massively benefits from the fact that the measurement relates to the planet, because the planet is a shelling point common to all humans and therefore a good way to reach an agreement. Meanwhile your ideas are great if you want to divide humanity into multiple disagreeing camps.