There is not one specific answer to the question, “How large are diamond carats?” because while diamonds may have the same carat weight, their sizes may vary as these are influenced by the cut and shape of the diamond.
It is actually very hard to compare diamond carats because each of the diamonds has to have the same quality, similar features as well as the cut.
If you would like to therefore compare diamond prices, it is recommended that you instead check for the price per carat of each diamond so you can get a good idea of how each one compares to the next.
How Large are Diamond Carats?
As mentioned above, the size of diamonds based on their carat weights differs from one cut to the next. So to answer the question, “How large are diamond carats?” look at each different cut and then check their approximate sizes.
To give you an idea of how large are diamond carats, see the following examples; using the Round Brilliant Cut as the basis of the size and comparing this with the other cuts.
Round Brilliant vs. Princess Cut
A Round Brilliant diamond cut of this carat has the approximate size of 4.1 millimeters while a Princess Cut of the same carat weight measures approximately 3.4 by 3.4 millimeters.
As for one carat of the Round Brilliant cut, this one measures approximately 6.5 millimeters while a Princess Cut worth one carat is about 5.5 by 5.5 millimeters.
You have seen the size of Round Brilliant cut diamonds compared with a Princess Cut of similar carat weights. Now for the Emerald Cut, compared also to similar carats mentioned above; a 0.25-carat Emerald Cut measures approximately 5 millimeters in length by 3 millimeters in width.
On the other hand, a .50-carat Emerald Cut diamond would measure about 6 millimeters in length by 4 millimeters in width.
1 CaratFinally for the one-carat Emerald Cut, this one measures about 7 in length by 5 millimeters in width.
You now have two sample sizes that can help you determine the answer to how large are diamond carats. You can compare the previous two samples with Pear Cut diamonds of similar carat weights.
A Pear Cut diamond that is worth .25 carat is about 4.5 in length by 2.5 millimeters in width.
For a .50-carat Pear Cut diamond, the size is about 6 millimeters in length by 4 millimeters in width.
Now for a one-carat Pear Cut diamond, you may have dimensions of this cut in measurements of 8 millimeters in length by 5.5 millimeters in width.
The three above-given sample sizes can give you a pretty good idea of how large are diamond carats in three different cuts; allowing you to compare sizes based on their shapes and cuts.