Professional Flanders© Cut Diamond Size Chart
Flanders© Cut Diamond Size Chart From CT to MM & Proportions Guide
The Flanders© Cut Diamond is a brilliantly engineered fancy cut Created by a Belgian gemologist in 1983 and first polished in 1987 in a small factory near Antwerp in the Flanders region of Belgium.
This cut-cornered square modified brilliant shape features 61 precisely arranged facets. It has a unique visual outline with four short sides, four long sides, and four cut corners, which gives it an octagonal-square form.
The Flanders© often matches or exceeds the brilliance of a round brilliant cut while offering a sophisticated geometric silhouette. It takes about one third longer to cut than a standard round brilliant, and is created using advanced computer technology, which is why it remains relatively rare and highly prized.
Below you will find professionally compiled carat to millimeter conversion charts along with clear, practical recommendations on depth, table, girdle, culet, and length to width ratios. These will help you confidently choose or advise on the perfect Flanders© diamond every time.
Flanders© Cut Diamond Conversion Tool From CT to MM / MM to CT
0.25 - 5.0 cts.
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| FLANDERS CUT DIAMOND CARAT WEIGHT | FLANDERS CUT DIAMOND MM SIZE |
|---|---|
| 0.25 | 3.54 - 3.79 mm. |
| 0.3 | 3.77 - 4.02 mm. |
| 0.4 | 4.16 - 4.41 mm. |
| 0.5 | 4.49 - 4.74 mm. |
| 0.6 | 4.78 - 5.03 mm. |
| 0.7 | 5.04 - 5.29 mm. |
| 0.8 | 5.26 - 5.51 mm. |
| 0.9 | 5.49 - 5.74 mm. |
| 1 | 5.68 - 5.93 mm. |
| 1.2 | 6.04 - 6.29 mm. |
| 1.3 | 6.21 - 6.46 mm. |
| 1.4 | 6.38 - 6.62 mm. |
| 1.5 | 6.53 - 6.78 mm. |
| 1.6 | 6.67 - 6.92 mm. |
| 1.7 | 6.80 - 7.05 mm. |
| 1.8 | 6.95 - 7.20 mm. |
| 1.9 | 7.08 - 7.33 mm. |
| 2 | 7.20 - 7.45 mm. |
| 2.2 | 7.43 - 7.68 mm. |
| 2.5 | 7.76 - 8.02 mm. |
| 2.7 | 7.96 - 8.21 mm. |
| 3 | 8.26 - 8.51 mm. |
| 3.5 | 8.70 - 8.95 mm. |
| 4 | 9.10 - 9.35 mm. |
| 4.5 | 9.46 - 9.71 mm. |
| 5 | 9.80 - 10.05 mm. |
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How a Flanders© Cut Diamond Looks on Hand
One of the best ways to truly appreciate a Flanders© cut diamond is to see how it sits on the finger. Its square shape with softly cut corners was designed to deliver balanced finger coverage and a refined, elegant presence that looks both classic and modern.
The 61 facet design and optimized proportions create exceptional sparkle and fire that really come alive on the hand. Many people love how it appears substantial and brilliant in real life while maintaining a clean geometric look that flatters every finger size.
If you wanted to look and visualize how a Flanders© Cut Diamond Looks like on Hand when worn, the following image is meant to answer just that and give you an approximation of its appearance across various carat weights.
What are the Ideal Proportions of an Flanders© Cut?
The Flanders© is a modified brilliant style cut that demands precise proportions to achieve its signature fire, brilliance, and balanced square silhouette. Because of its 61 facet arrangement and unique cut-cornered outline, ideal measurements help maximize light performance while preserving the elegant geometry that makes this cut so distinctive.
What is the Ideal Diamond Depth and Table for the Flanders© Cut?
Flanders© Cut Diamond Recommended Proportions Guide
Achieving the perfect balance of depth and table percentage is essential for the Flanders© cut to return maximum fire and brilliance without appearing dark or overly spread. The following guidelines, developed through extensive gemological experience with this patented cut, ensure the stone displays its legendary sparkle and impressive face up size.
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
Table - % | 55% - 62% | 53% - 65% | 51% – 66% |
Depth - % | 60% - 66% | 58% - 69% | 56% - 72% |
Girdle | Thin to Medium | Very Thin to Slightly Thick | Very Thin to Thick |
Culet | None | None to Very Small | Small |
What is the Ideal Flanders© Cut Diamond Length to Width Ratio?
The length to width ratio is one of the most defining features of the Flanders© Cut Diamond. This shape is intentionally cut close to square to create balanced finger coverage, a clean geometric presence, and outstanding brilliance. The ideal ratio centers around 1.00. While personal taste always plays a role, the ratios below have consistently proven to deliver the most balanced, elegant, and desirable appearance that sets a Flanders© apart from every other shape.
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Length To Width Ratio | 1.00 – 1.05 | 0.98 – 1.10 | 0.95 – 1.15 |