You would use the unit pounds or 'lb.' Usually, when measuring the weight of anything, you would use the unit pounds. Weight is to differentiate the difference in mass from one place to another. On the moon you weigh something, on the earth you weigh something heavier. So, to compare that, we generically use pounds to identify weight. An example: 25 lb. If you were measuring mass, however, it would be grams then.
pounds
pounds
ounces
Cm
Miles.Miles.Miles.Miles.
Inches.
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."
The ounce.
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.
SI . . . Newton 'Customary' . . . pound, ounce, etc.
Seconds
Normally pounds or Kilograms but larger amounts could move in to tons and metric tons
ounces
ounces
It depends on what you want to measure. Their mass or size?
Pint.