Article: Diamond Solitaire Necklace Size Comparison | How to Choose and Top Sizes from 0.3ct to 3ct
Diamond Solitaire Necklace Size Comparison | How to Choose and Top Sizes from 0.3ct to 3ct
When choosing a necklace, size is often the most confusing factor. Carat is a unit representing the "weight" of a stone, not its actual visual size. The impression can also change depending on the shape of the stone and the design of the setting.
On this page, we introduce JEWELRY CASTLE’s solitaire lab-grown diamond necklaces (round brilliant cut), ranging from 0.3ct to 3ct. Please use the estimated stone size, the overall pendant dimensions, and the wearing images as a guide.
Size Chart
| Listed Size | Estimated Stone Size (Diameter) |
Pendant Size (Height x Width x Depth) |
|---|---|---|
| 0.3ct | Approx. 4.2–4.5mm | Approx. 7×5×3.5mm |
| 0.5ct | Approx. 5.2–5.5mm | Approx. 8×6×4mm |
| 1.0ct | Approx. 6.2–6.5mm | Approx. 10×7×4.5mm |
| 1.5ct | Approx. 7.2–7.5mm | Approx. 12×8×5.3mm |
| 2.0ct | Approx. 8.0–8.3mm | Approx. 14×10×5.8mm |
| 3.0ct | Approx. 9.0–9.3mm | Approx. 14×9.5×7mm |
About Estimated Stone Sizes
There is no uniform standard for lab-grown diamond sizes, and there can be variations in diameter even for the same carat weight. The "Estimated Stone Size" in the table is a general guideline representing the range commonly seen for round brilliant cuts with an EX or IDEAL cut grade. It does not reflect the exact measurements of individual products.
About Pendant Size
This refers to the dimensions of the entire product, including the setting that holds the stone. It differs from the diameter of the stone. Slight variations may occur depending on the final finish.
All six round brilliant products on this page feature a 3EX cut grade (Excellent cut, polish, and symmetry).
Compare Stone Sizes Side-by-Side
The estimated stone sizes (midpoint of the range) are lined up as circles to the same scale. Please use this as a reference to see how the diameter changes as the carat weight increases.
Size reference diagram based on general estimates (not actual size). Circles are drawn using the midpoint of the range. Please see the table above for the ranges. Display sizes will vary depending on your screen size.
Introduction by Size
These are wearing images created by compositing actual necklaces onto the same model and outfit. The appearance may differ from reality. Please check the actual size using the provided measurements and the reference diagram above.
0.3ct
Estimated Stone Size Approx. 4.2–4.5mm
Pendant Size Approx. 7×5×3.5mm
Setting 6-prong
A dainty size. If you prefer a subtle look that blends into your attire, try starting with this size.
View 0.3ct Product
0.5ct
Estimated Stone Size Approx. 5.2–5.5mm
Pendant Size Approx. 8×6×4mm
Setting 6-prong
One size larger than the 0.3ct. Personal perception of how it looks may vary.
1.0ct
Estimated Stone Size Approx. 6.2–6.5mm
Pendant Size Approx. 10×7×4.5mm
Setting 6-prong
Listed Weight Range 1.00–1.09ct
The pendant height is approximately 10mm. For solitaire necklaces, 1ct is often the baseline size many people consider.
View 1.0ct Product
1.5ct
Estimated Stone Size Approx. 7.2–7.5mm
Pendant Size Approx. 12×8×5.3mm
Setting 6-prong
Listed Weight Range 1.50–1.59ct
Relatively easy to wear for daily use while offering a moderate amount of glamour. A size between 1.0ct and 2.0ct.
2.0ct
Estimated Stone Size Approx. 8.0–8.3mm
Pendant Size Approx. 14×10×5.8mm
Setting 6-prong
Listed Weight Range 2.00–2.09ct
We consider 2 carats the starting point for what is called a "large, glamorous" stone.
The pendant width is approximately 10mm.
3.0ct
Estimated Stone Size Approx. 9.0–9.3mm
Pendant Size Approx. 14×9.5×7mm
Setting 4-prong
Listed Weight Range 3.00–3.09ct
The pendant height is about 14mm, same as the 2.0ct, but it has a depth of about 7mm. Please check the estimated stone size for the actual scale. K18 yellow gold versions are also available.
View 3.0ct ProductHow to Read Wearing Images and Size Specifications
Estimated Stone Size refers to the general approximate diameter of the stone itself. Pendant Size refers to the dimensions of the entire product including the setting. As these are two different figures, please be careful when comparing them.
The screen display is not actual size. To get a better idea of the actual size, you may find it helpful to compare the measurements against a ruler.
For Those Considering Larger Sizes
If you would like a size larger than 3ct, please let us know your preferences regarding size, shape, color, and design.
Availability, price, and delivery time vary depending on the size, shape, and quality. We will guide you after confirming the details individually.
Examples of Large Size Projects
These are just a few examples of our past creations and items handled. We cannot guarantee that we can always provide the same stone or size.
Past Project
Past Project
Past Project
Ring with side stones
Past Project
Pendant
Past Project
Handled Item (Stone only)
