When shopping for a pear cut diamond, one of the most important factors is understanding its size in both carats and millimeters. Carat weight tells you how heavy the diamond is, while millimeters describe the physical dimensions (length and width) - which is what your eyes actually see.
This guide includes a Pear Cut Diamond Size Chart so you can easily convert between carats and millimeters, helping you choose the perfect stone.
What Is a Pear Cut Diamond?
A pear cut (also known as a teardrop cut) is a combination of the round brilliant and marquise shapes, with a rounded bottom and a pointed top.
It is admired for:
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Elegant elongation (makes fingers look slender)
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Brilliant sparkle due to its faceting
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Unique symmetry that balances curves and angles
Why Carats and Millimeters Matter
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Carat is a weight measure (1 carat = 0.2 grams).
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Millimeter size is the actual visual dimension you’ll see on your finger.
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Two diamonds of the same carat weight can look different in size depending on cut proportions and depth.
For pear cut diamonds, the length-to-width ratio (L/W) affects appearance:
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L/W of 1.45–1.55 → Classic teardrop look
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L/W below 1.40 → Shorter and wider
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L/W above 1.60 → Longer and more slender
Pear Cut Diamond Size Chart (Carat ↔ Millimeter)
Based on typical proportions with an average depth of ~60–62% and L/W ratio of 1.50.
| Carat Weight | Length (mm) | Width (mm) | L/W Ratio |
|---|---|---|---|
| 0.25 ct | 6.0 mm | 4.0 mm | 1.50 |
| 0.50 ct | 7.5 mm | 5.0 mm | 1.50 |
| 0.75 ct | 8.5 mm | 5.7 mm | 1.49 |
| 1.00 ct | 9.0 mm | 6.0 mm | 1.50 |
| 1.25 ct | 9.7 mm | 6.5 mm | 1.49 |
| 1.50 ct | 10.4 mm | 6.9 mm | 1.51 |
| 1.75 ct | 11.0 mm | 7.3 mm | 1.51 |
| 2.00 ct | 11.5 mm | 7.6 mm | 1.51 |
| 2.50 ct | 12.4 mm | 8.2 mm | 1.51 |
| 3.00 ct | 13.2 mm | 8.8 mm | 1.50 |
| 4.00 ct | 14.7 mm | 9.8 mm | 1.50 |
| 5.00 ct | 16.0 mm | 10.7 mm | 1.50 |
Tips for Choosing the Right Size
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Finger size matters — longer L/W ratios elongate fingers.
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Consider setting style — halos can make a smaller carat look larger.
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Check spread — some stones have more face-up area for the same carat.
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Balance budget and look — sometimes a slightly lower carat with better proportions looks bigger.
Final Thoughts
When buying a pear cut diamond, don’t rely only on carat weight - check the millimeter dimensions and proportions.
This chart gives you a reliable carat-to-mm guide, but always confirm measurements with the jeweler, as individual stones vary.
