Diamond Size Chart
Interactive Guide to Carat Sizes
Make your own diamond size chart: Select the shapes you're interested in, set the carat range you want to see, and click "Make my Chart".
You can examine the actual sizes on screen, print the chart you just created, or download it as an image to your device.
Start with: ct Step: ct End with: ct
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| Ct | Actual size (mm) | ||||||||||
| 0.5 |  5.2 |  4.4 |  5.3×3.9 |  4.6 |  6.4×4.3 |  4.6 |  8.2×4.1 |  4.5 |  7.2×4.3 |  5.2 |  6.1 |
| 1 | 6.5 | 5.5 | 6.7×5 | 5.8 | 8.1×5.4 | 5.8 | 10.4×5.2 | 5.6 | 9.1×5.5 | 6.6 | 7.7 |
| 1.5 | 7.4 | 6.3 | 7.7×5.7 | 6.7 | 9.3×6.2 | 6.6 | 11.9×6 | 6.4 | 10.4×6.2 | 7.5 | 8.9 |
| 2 | 8.2 | 6.9 | 8.4×6.2 | 7.3 | 10.2×6.8 | 7.3 | 13.1×6.5 | 7.1 | 11.4×6.9 | 8.3 | 9.8 |
| 2.5 | 8.8 | 7.5 | 9.1×6.7 | 7.9 | 11×7.3 | 7.8 | 14.1×7.1 | 7.6 | 12.3×7.4 | 8.9 | 10.5 |
| 3 | 9.4 | 8 | 9.6×7.1 | 8.4 | 11.7×7.8 | 8.3 | 15×7.5 | 8.1 | 13.1×7.9 | 9.5 | 11.2 |
| 3.5 | 9.9 | 8.4 | 10.1×7.5 | 8.9 | 12.3×8.2 | 8.8 | 15.8×7.9 | 8.5 | 13.7×8.3 | 10 | 11.8 |
| 4 | 10.3 | 8.8 | 10.6×7.9 | 9.3 | 12.9×8.6 | 9.2 | 16.5×8.2 | 8.9 | 14.4×8.7 | 10.4 | 12.3 |
| 4.5 | 10.7 | 9.1 | 11×8.2 | 9.6 | 13.4×8.9 | 9.5 | 17.1×8.6 | 9.3 | 14.9×9 | 10.8 | 12.8 |
| 5 | 11.1 | 9.4 | 11.4×8.5 | 10 | 13.9×9.3 | 9.9 | 17.8×8.9 | 9.6 | 15.5×9.3 | 11.2 | 13.2 |
| Ct | Size (mm) | ||||||||||
| 0.5 | 5.2 | 4.4 | 5.3×3.9 | 4.6 | 6.4×4.3 | 4.6 | 8.2×4.1 | 4.5 | 7.2×4.3 | 5.2 | 6.1 |
| 1 | 6.5 | 5.5 | 6.7×5 | 5.8 | 8.1×5.4 | 5.8 | 10.4×5.2 | 5.6 | 9.1×5.5 | 6.6 | 7.7 |
| 1.5 | 7.4 | 6.3 | 7.7×5.7 | 6.7 | 9.3×6.2 | 6.6 | 11.9×6 | 6.4 | 10.4×6.2 | 7.5 | 8.9 |
| 2 | 8.2 | 6.9 | 8.4×6.2 | 7.3 | 10.2×6.8 | 7.3 | 13.1×6.5 | 7.1 | 11.4×6.9 | 8.3 | 9.8 |
| 2.5 | 8.8 | 7.5 | 9.1×6.7 | 7.9 | 11×7.3 | 7.8 | 14.1×7.1 | 7.6 | 12.3×7.4 | 8.9 | 10.5 |
| 3 | 9.4 | 8 | 9.6×7.1 | 8.4 | 11.7×7.8 | 8.3 | 15×7.5 | 8.1 | 13.1×7.9 | 9.5 | 11.2 |
| 3.5 | 9.9 | 8.4 | 10.1×7.5 | 8.9 | 12.3×8.2 | 8.8 | 15.8×7.9 | 8.5 | 13.7×8.3 | 10 | 11.8 |
| 4 | 10.3 | 8.8 | 10.6×7.9 | 9.3 | 12.9×8.6 | 9.2 | 16.5×8.2 | 8.9 | 14.4×8.7 | 10.4 | 12.3 |
| 4.5 | 10.7 | 9.1 | 11×8.2 | 9.6 | 13.4×8.9 | 9.5 | 17.1×8.6 | 9.3 | 14.9×9 | 10.8 | 12.8 |
| 5 | 11.1 | 9.4 | 11.4×8.5 | 10 | 13.9×9.3 | 9.9 | 17.8×8.9 | 9.6 | 15.5×9.3 | 11.2 | 13.2 |
or
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Tips For Printing ▼
Using Downloaded Charts▼
In the print dialog, ensure that the paper size is set to A4 and use "100% scale" or "Actual Size". Don't choose "Fit to page" or "Shrink to page". Set margins to "Minimum" or "None". You can choose "Save to PDF" if you want to save the chart to print out later or share it.
Actual size will depend on your printer configuration, operating system, the browser you are using, etc., so it cannot be 100% guaranteed. It's usually very close or spot on, but before cutting the shapes, it's a good idea to take a ruler and check. If it's a bit off, for example, instead of 10mm it's 11mm (+10%), you could use scaling to get it right (for the given example you would set the scale to 90%).
Actual size will depend on your printer configuration, operating system, the browser you are using, etc., so it cannot be 100% guaranteed. It's usually very close or spot on, but before cutting the shapes, it's a good idea to take a ruler and check. If it's a bit off, for example, instead of 10mm it's 11mm (+10%), you could use scaling to get it right (for the given example you would set the scale to 90%).
Using Downloaded Charts▼
First, a quick note about copyright: You are free to use the charts you've created and downloaded with this web tool in any way you see fit, provided you give appropriate credit if possible. Just state where you got them; a link to the source would be awesome. No need to ask for permission. More info here »
Please note that downloaded charts in image format (png) do not represent actual sizes in mm. Keep that in mind if you want to put them on your website. Also, don't print the images, they won't be actual size. If you want to print, click the Print This Chart button; you can then either print to paper directly from the browser or print to PDF, which you can save and share. PDFs, when printed, will be at actual size.
Please note that downloaded charts in image format (png) do not represent actual sizes in mm. Keep that in mind if you want to put them on your website. Also, don't print the images, they won't be actual size. If you want to print, click the Print This Chart button; you can then either print to paper directly from the browser or print to PDF, which you can save and share. PDFs, when printed, will be at actual size.
Diamond Size Facts
Diamond size (width, length, and depth) is measured in milimetres (mm). Diamond weight is measured in carats (ct). Carat is an international unit of weight and equals to 0.2 grams. Important to remember: Carat means weight, not visual size (mm).
Do Twice the Carats Mean Twice the Size?
No. Dimensions do not grow linearly with weight. A 2ct Round diamond (8.2mm diameter) does not look twice as big as a 1ct (6.5mm). It's twice the weight but definitely not twice the size. See for yourself - 1ct vs 2ct. It is, however, much more than twice the price.
Here is a quick 1 carat vs 2 carat size chart for selected shapes:
Here is a quick 1 carat vs 2 carat size chart for selected shapes:
Do Twice the Carats Mean Twice the Price?
No. Heavier diamonds are rarer and therefore much more valuable. The price grows exponentially. A good quality 2ct natural Round diamond can cost around 5 times more than a good quality 1ct Round.
Are Diamonds Of The Same Carats And The Same Shape Always The Same Size?
No. They can vary noticeably in size(mm) because of the way they are cut even though they weigh(ct) the same. Diamonds that are more deep-cut will hold/hide more weight below the surface, making their face-up size smaller. Cut proportions also matter in regard to sparkle. Diamonds cut too deep or too shallow will not be the sparkliest diamonds.
Are Carats and Karats The Same?
No. They sound the same but are in fact measuring two completely different things. Carat measures the weight of diamonds and other gemstones (rubies, sapphires, etc.), while Karat measures the purity of gold. 24K gold means gold of 99,9% purity. In jewelry, you will usually find 12K to 18K gold, because pure gold (24K) is just too soft for practical use; i.e., it would deform too easily if used as daily-wear jewelry.
How Does the Shape of a Diamond Affect Its Size?
Shapes are cut differently, they distribute weight differently, and therefore will face-up differently. Face-up size is how large a diamond appears when you look at it from the top. Some shapes look bigger because they spread their weight more across the top (Marquise, Oval, Pear), while others look smaller because they hold more weight in depth (Asscher, Princess, Cushion). Round Cut diamonds are somewhere in the middle when it comes to face-up size.
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Actual size is currently adjusted to screen.
If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a diamond, ring and finger will not be shown correctly.
If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a diamond, ring and finger will not be shown correctly.
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Please make it smaller and try again. Thank you!
Please make it smaller and try again. Thank you!