There is no such object since a milligram is a measure of mass, not of weight. A small ant would have a mass of 1 mg.
A paper clip.
0.001g. A gram weighs a thousand times more than a milligram
a bubble weighs one milligram
One milliliter of pure water.
A centigram; 10 times bigger than a milligram.
A milligram is a measure of mass equal to about 0.00003527 ounce.
A piece of gum.
one milligram per pound.
A milligram is 1,000 times heavier than a microgram.
A milligram is 10 times less than a centigram.
The word milligram does not have a synonym. Milligram is a unit that is used to measure the mass of an object.
GRAM