The short answer
Carat measures weight, not size. The right stone is the one that feels balanced on the hand.
Two diamonds of the same carat can look completely different depending on their shape, proportions, and how they are set. Understanding this changes everything, allowing you to choose a diamond not simply for its size, but for how it is experienced.
01
What Is Diamond Carat?
Carat is the unit used to measure a diamond's weight.
1 carat = 0.20 grams
While it is often used as a reference for size, carat alone does not determine how large a diamond will appear. The way a diamond is cut plays an equally important role in how it presents visually.
A well-cut diamond can appear larger and more brilliant than a heavier stone with poor proportions.
02
Why two diamonds of the same carat can look different
Not all diamonds carry their weight in the same way.
Some shapes, such as oval, marquise, and pear, spread their weight across a larger surface area. This creates the illusion of a bigger diamond.
Others, such as round and cushion cuts, carry more depth, which can make them appear slightly smaller from above, while often delivering stronger brilliance.
This is why choosing the right combination of shape and proportion is just as important as selecting the carat itself.
03
How diamond size appears on the hand
The way a diamond looks once worn depends on more than just carat.
Factors that influence appearance include:
- Finger size and proportions
- Band thickness and design
- Setting style and height
- Diamond shape
A 2 carat diamond on a finer band will appear larger than the same diamond on a heavier setting. Similarly, elongated shapes can create a more expansive look across the finger.
“Carat measures weight, not visible size. A well-cut diamond can appear larger and more brilliant than a heavier stone with poor proportions.”
04
Choosing the right diamond size
There is no single "ideal" carat weight. The right size is the one that feels balanced, both visually and personally.
Some prefer a more understated look, where the diamond complements the hand without overwhelming it. Others are drawn to larger stones that make a more defined statement.
Lab grown diamonds allow for a different approach to this decision. Rather than compromising between size and quality, it becomes possible to choose both.
05
Popular diamond sizes for engagement rings
While every piece is individual, certain carat weights are more commonly chosen:
- 1.00 carat – refined, balanced, timeless
- 1.50 carat – noticeable presence without excess
- 2.00 carat – confident, elegant, well-proportioned
- 3.00 carat and above – bold, expressive, statement-driven
What matters most is not the number itself, but how the diamond feels once it is set and worn. See engagement rings across every popular carat weight in our curated collection.
06
Size vs Quality, finding the balance
Traditionally, choosing a diamond often meant balancing size against quality. Lab grown diamonds remove much of this compromise.
With greater accessibility, it becomes possible to select a diamond that offers both presence and refinement. High colour, high clarity, and strong proportions can exist alongside meaningful carat weights.
At Orlaithea, the focus is always on balance. A diamond should feel complete, not just large.
07
How setting style impacts size
The way a diamond is set can dramatically influence how large it appears.
- Solitaire settings allow the diamond to stand alone, maximising focus
- Hidden halos subtly enhance perceived size without changing the silhouette
- Fine bands create contrast, making the diamond appear larger
- Three stone designs add presence across the finger
These small design decisions shape how a diamond is experienced.
08
Our approach
Our Approach at Orlaithea
At Orlaithea, diamond size is never considered in isolation. Every stone is selected in person, viewed under natural light, and chosen for how it truly performs.
By focusing exclusively on lab grown diamonds, we offer a level of flexibility that allows each piece to feel complete. Size, quality, and design are considered together, not separately.
Frequently asked questions
What carat size is best for an engagement ring?
There is no single best size. The right carat depends on personal preference, hand proportions, and how the diamond is set. View engagement rings across every carat weight.
Does a higher carat mean a bigger diamond?
Not always. Carat measures weight, not visible size. Shape and cut can make a diamond appear larger or smaller.
What diamond shape looks the biggest?
Elongated shapes such as oval, marquise, and pear tend to appear larger due to how they distribute their weight.
Are lab grown diamonds available in larger sizes?
Yes. Lab grown diamonds offer greater accessibility, making larger, high-quality stones more attainable.
Is it better to choose size or quality?
Ideally both. Lab grown diamonds allow you to achieve a balance between size, colour, clarity, and cut without the traditional compromise.
Ready to find your diamond?
Every Orlaithea ring is hand-crafted around a stone you've seen, held, and chosen yourself.