You've given the carat weight of a diamond. 'Big', then, is based on the cut of the stone.
According to Wikipedia, it is 105 carats, and at one time was the largest cut diamond in the world. Read more, below.
Carats is a weight measurement for diamond, so your answer depends on how much your diamond weighs. Karats is a purity measurement for gold. Carrots grow in your vegetable garden.
A diamond weighing .07 carats (7/100ths of a carat) measures about 2.7 mm if the diamond is cut in the round brilliant style.
45.52 carats
paragon
The diamond weighs 112 carats, or 0.790136 ounces.
A 2 mm round diamond weighs about .03 carats, so a 1.5 mm round diamond would be smaller than .03 carats. A .01 carat diamond is about as big as a grain of sand.
The diamond weighs .125 carats. Its mm measurements depend on the cut.
There are 45.52 carats on the hope diamond
Zero carats means that there is no weight to the stone. Perhaps that the stone is not a diamond? There is no notation for a diamond equal to zero carats.
Diamonds are weighed in carats.
All the carats in the Hope Diamond are classified as blue-gray.
A 20 carat diamond weighs 20 carats. If the diamond is a round brilliant cut, it measures about 17.6 mm at the girdle.
45.52 CaratsThe Hope Diamond is 45.52 carats. By comparison the average engagement ring is only 0.3 carats.
Carats.
The biggest carat in a cut diamond is 20 carats. The largest diamond ever found was 530 carats.
A round cut diamond weighing .25 carats measures 4.1mm at the girdle.