How to Choose the Right Size for You
Consider your personal style
Do you prefer a subtle, delicate look or a bold, statement-making diamond?
Think about your budget
Choose a carat size that fits within your budget while still offering the impact you desire.
Consider how it will look on your hand
Visualise how different carat sizes will appear on your finger.
Our expert guidance
We’re here to help you select the perfect carat size, ensuring the diamond fits beautifully with your overall vision.
Millimetres vs Carat Weight Measurements
When shopping for a diamond, it’s important to understand the difference between millimetre size and carat weight.
While carat weight measures the mass of the diamond, millimetre size refers to its actual surface dimensions. Essentially, carat weight helps define the diamond’s weight, while millimetre size tells you how big it looks.
It’s important to note that diamonds of the same carat weight can appear slightly different in size, depending on the shape and cut.
For example, an oval diamond of the same carat weight as a round diamond may appear slightly larger due to its elongated shape.
We carefully consider both measurements to ensure that every diamond we offer looks just as stunning as it feels.
While carat weight is a key factor in determining a diamond’s size, the shape and cut play significant roles in how large the diamond appears.
Different shapes distribute weight in different ways, and as a result, some diamonds can look larger than their carat weight suggests.
For example, an oval or emerald cut can appear larger for its carat weight, while a round brilliant cut may appear more compact, despite the same carat weight.
The depth of the diamond also impacts its appearance - while a deeper diamond might look smaller face-up, it can hold more weight below the surface.
Below you will find approximate diamond millimetres compared to diamond carat weights.
ROUND
4mm - 0.25ct
5mm - 0.5ct
6mm - 0.85ct
7mm - 1.25ct
7.5mm - 1.5ct
8mm - 2ct
8.5mm - 2.45ct
9mm - 2.75ct
OVAL
6 x 4mm - 0.5ct
7 x 5mm - 0.75ct
8 x 5mm - 1ct
9 x 6mm - 1.4ct
9 x 7mm - 1.75ct
10 x 7mm - 2ct
10 x 8mm - 2.5ct
11 x 9mm - 3.5ct
RADIANT
6 x 4mm - 0.5ct
7 x 5mm - 1ct
8 x 6mm - 1.75ct
8.5 x 6.5mm - 2ct
9 x 7mm - 3ct
10 x 8mm - 4ct
PEAR
6 x 4mm - 0.5ct
7 x 5mm - 0.7ct
8 x 6mm - 0.8ct
9 x 6mm - 1.25ct
10 x 7mm - 1.17ct
12 x 8mm - 3ct
CUSHION
5mm - 0.75ct
6mm - 1.15ct
7mm - 1.75ct
7.5mm - 2.25ct
8mm - 2.5ct
8.5mm- 3ct
9mm - 4ct
*These are approximate measurements only, all our Lab-Grown Diamond engagement rings are based around carat
At JUNI, we carefully select the ideal diamond to match your chosen design.
We handpick the best diamond that fits that specification, ensuring it has the right proportions, brilliance, and cut quality to complement your choice.
Our goal is to ensure that the diamond not only meets the desired carat weight but also enhances the overall beauty and sparkle of your ring.
Every diamond we select is chosen with care to guarantee it looks stunning, perfectly proportioned, and timelessly radiant.
