The appropriate scale for the measurement of the weight of an earring would the milligram. this is because the weight of an earring is so small that it would be difficult to determine it s weight while reading on a bigger scale like the kilogram.
The customary unit of weight best suited to measure earrings would be ounces or grams. Ounces are commonly used for lightweight items like jewelry, while grams provide a more precise measurement for smaller weights. Both units are appropriate for measuring the weight of earrings accurately.
Normally pounds or Kilograms but larger amounts could move in to tons and metric tons
Measuring cup
After pounds, the next unit of weight measurement commonly used in the imperial system is ounces.
You could measure weight with a spring scale, unless you mean mass, which you would measure with a laboratory balance. You would measure time with a stop watch, and height with a meter stick.
You would most likely use milliters.
It depends on what you want to measure. Their mass or size?
It is customary to use the kilogram - though that is technically not a weight, but a mass.
pounds
You would use pounds or kilograms to measure the weight of a person.
Normally pounds or Kilograms but larger amounts could move in to tons and metric tons
Seconds
In most countries, it is customary to measure that in liters.
You would typically use fluid ounces (oz) or cups (c) to measure the volume of a mayo jar in customary units.
ounces
ounces
Either inches or millimetres Or centimetres.
Pint.