Mass is measured in kilograms. Weight is measured in newtons. If you are asking which unit to choose to measure then mass of a marble, then you need to use the submultiple of the kilogram, the gram.
That depends what aspect of a marble you want to measure, for example its diameter, its mass, its density, its color, etc.
grams which unit would you use to measure the mass of a mouse
A kilogram (kg) would be the most appropriate unit to measure the mass of a cow.
The metric unit of mass is the kilogram. Why you would need to measure the mass of a necktie is beyond me.
You Use Atomic Mass Number
Grams are the best metric or SI unit to measure the mass of an egg
Milligram: to measure its mass.