This chart is an accurate representation of carat weight to mm dimensions. In this case, a heart shaped diamond may exhibit dimensions of 6.15mm x 6.80mm and this is perfectly acceptable.ĭon’t Forget: Download your printable carat size chart that you can easily carry around to visualize and perform diamond size comparisons. Obviously, the dimensions of a 0.90 l/w ratio heart diamond would no longer be 6.50mm x 6.50mm. Most people ( including myself) prefer fatter looking stones with length to width ratios of around 0.90:1. This is based on a length to width ratio of 1:1. In our charts, the dimensions of a 1 carat heart shaped diamond is indicated as 6.50mm x 6.50mm. Let me illustrate by using the heart shaped diamond as an example… You need to understand that the “best” length to width ratios for fancy shaped diamonds are largely up to personal tastes and there’s no right or wrong if you prefer a particular look.

What I want to highlight here is that the dimensions/diameters shown here are based on “ideal” length to width proportions. Click here to find out more…įor people who are looking up carat size to mm information for fancy cut diamonds, we had also compiled some useful reference data on this page. James Allen has created a useful graphic illustration to help you see how an engagement ring with varying diamond sizes would look like when worn.

Visualizing And Comparing Diamond Sizes on a Hand All images are drawn precisely to scale for A4 sized paper printing. Printable Carat Weight to MM Chart: Here’s a free diamond sizing chart that you can download and print out for your convenience. Hopefully, this clears up the misunderstanding of carat weight and actual sizes. Likewise, the physical size of a 2 carat diamond (8.2mm diameter) isn’t twice as big as that of a 1 carat diamond (6.5mm diameter). Even though the carat weight is 50% of a 1 carat stone, it doesn’t face up twice as small! Just because a diamond is twice as heavy as another stone, it doesn’t mean it will look twice as large as the other.Īs you can see above, the size of a 1 carat diamond is approximately 6.5mm ( based on the assumption that the stone is cut to ideal proportions). Now, I want to address a common misconception that people have when shopping for diamonds. Due its cutting style that’s optimized for brilliance and dispersion, round brilliants make up for more than 60% of all diamonds sold in the world. Round Diamond Size ChartĬurrently, the standard 57 facets round brilliant cut is the most popular choice of shape. Note: depending on your screen resolution, the actual size seen may vary. We have compiled diamond weight charts for the most popular diamond shapes in the market! If you are having problems with visualizing actual diamond sizes in real life, you’ve come to the right place.

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