Quick and Easy Buying Guide
Carat weight: 1 carat = 200 milligrams = 6.5 mm diameter. Doubling weight doesn't double diameter.
Diamond clarity: FL/IF/VVS/VS = super expensive, near perfect. SI = best value if you can check a photo for obvious inclusions (defects).
Color: D-G = colorless, expensive, only if you have money to burn. H-J = best value. Can go lower in gold metal settings than white metal.
Cut: Better cut ratings let more light into a diamond, making it sparkle more. Very important property, don't skimp here.
Set a budget and minimum cut (Premium). Go J color for gold and I/H for white metals. Go searching for SI1/SI2 clarity diamonds at James Allen. Pick a diamond with small/no inclusions. Choose a ring setting and buy it risk-free (60-day returns).
Actual Diamond Sizes of a 1.58 Carat Princess Shape Diamond
The image shown on this webpage illustrates the ballpark size of a 1.58 carat size princess shape diamond on the hand of a woman. If you search around on the web to find the actual size of a 1.58 carat weight princess shape diamond, you may notice the numbers are slightly different across different sites - this is due to the fact that the size (6.9 mm for this particular diamond) depends on things like cut as well.
If you've got a ring in your possession and you know what it's size is, you can compare it to the US size six ring pictured - this will assist you in getting a better idea of the diamond size shown in the photo.
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The dimensions of a woman's hand vary a lot between women - just look around you when you're next in public - so this illustration can only provide the apparent diamond size for one particular ring size. Consider the ratio between the length and width of a finger - this ratio will affect how big and suitable a diamond appears when it is slipped in a ring onto the hand.
