A metric gram would be precise enough of a measurement for a stamp.
Newtons
This isn't a US Postage stamp, but a charity label. It was probably sent out in a mass mailing requesting people to send donations. And by putting them on the back of other envelopes, they would get advertising.
I got 0.0533g after weighing out several hundred and taking an average, stamps from 1870 to 1990
I would use a postage scale or a laboratory balance to derive the mass of the card.Once I knew the mass, if I had to write it down, remember it, or tell other peopleabout it, it would undoubtedly be most convenient to express it in grams .
Mass is measured usingtriple beam balance bathroom scale baby scale postage stamp scale kitchen scale floor/ truck scales
mass of a substance or an object
You would use the unit of measure called "kilograms" to measure the mass of an elephant.
Milligram: to measure its mass.
No, millilitres is a measure of volume not mass. You would use milligrams.
The most common thing you would measure mass in would be grams and kilograms
You Use Atomic Mass Number
Anything with masscan have that mass measured and expressed in grams.