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.
Normally pounds or Kilograms but larger amounts could move in to tons and metric tons
Measuring cup
In relation to weight in the customary system, the weight after pounds would be tons.
Weight: a spring balance.Time: a chronometerHeight: a tape measure.However, in all cases, these would not be appropriate in all cases. You could not use a spring balance to measure the weight of an elephant, or a tape measure for a mountain.
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
The weight of a person would be measured in kilograms or pounds, depending on the system of units of measure you are using. Some people in the UK still use the customary unit of "stone."
Normally pounds or Kilograms but larger amounts could move in to tons and metric tons
Seconds
You would typically use fluid ounces (oz) or cups (c) to measure the volume of a mayo jar in customary units.
In most countries, it is customary to measure that in liters.
ounces
ounces
Either inches or millimetres Or centimetres.
Cm