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Princess Cut Diamond Size

A Guide to Princess Cut Diamond Size (MM to Carat)

Finding the perfect diamond is a big deal. It's like uncovering a shiny token of love and dedication. But diving into the diamond world can be a bit daunting. There are tons of cuts, sizes, and specs to sift through.

But fear not! We highlight one of the most enchanting cuts: the princess cut. We've got just the thing to help you turn those millimeters into a sparkly masterpiece with our handy princess-cut diamond size chart (MM to Carat).

Key Takeaways

  • Understanding Diamond Size
  • Importance of Balance
  • Visual Comparisons
  • MM to Carat Conversion
  • Comprehensive Consideration
  • Confident Decision-Making

What is the appeal of the Princess Cut?

Unlike the classic round brilliant cut, the princess cut offers a distinctive square or rectangular shape with sharp, pointed corners. This geometric wonder exudes a contemporary charm, with its clean lines adding a dash of sophistication to any jewelry piece.

What makes the princess cut truly shine is its unique faceting pattern, which maximizes brilliance by optimizing light return. As light dances across its facets, the princess cut creates a mesmerizing play of light and shadow, igniting a captivating fire within the diamond. It's a dazzling spectacle that never fails to leave a lasting impression.

So, if you're in the market for a diamond that combines modern elegance with stunning brilliance, the princess cut might be the perfect choice!

Understanding Carat Weight and Millimeter Measurements

So, when we say carat weight (ct), we're talking about the size of a diamond. It's like measuring weight with one carat equaling about 0.2 grams. On the other hand, when we mention millimeter (mm) measurements, we're getting into the physical diameter of the diamond across its widest point.

Now, here's where things get interesting. The relationship between carat weight and millimeter size can be a challenging 1:1. Why? Well, it's because of variations in a diamond's cut proportions. So, imagine this: you've got two diamonds with the same carat weight, but their millimeter sizes might differ because of how they're cut.


Princess MM Size

Princess carat Weight

1.90 - 2.00 mm 0.04 - 0.05 ct
2.10 - 2.20 mm 0.05 - 0.06 ct
2.30 - 2.40 mm 0.07 - 0.08 ct
2.50 - 2.60 mm 0.09 - 0.11 ct
2.70 - 2.80 mm 0.12 - 0.13 ct
2.90 - 3.00 mm 0.14 - 0.17 ct
3.10 - 3.20 mm 0.18 - 0.21 ct
3.30 - 3.40 mm 0.22 - 0.24 ct
3.50 - 3.60 mm 0.25 - 0.28 ct
3.70 - 3.80 mm 0.30 - 0.35 ct
3.90 - 4.00 mm 0.35 - 0.40 ct
4.10 - 4.20 mm 0.40 - 0.45 ct
4.30 - 4.40 mm 0.45 - 0.50 ct

Choosing the Perfect Princess-Cut Diamond Size

Now that you have our princess cut diamond size chart (MM to carat), let's explore the factors that impact your size selection. Here are some key considerations:

Budget: Diamond prices rise sharply with carat weight. Use the chart to find a size range that fits your budget.

Ring Setting: Your choice of setting can affect how big or small the diamond appears. Consider a halo setting to make the diamond seem larger.

Finger Size: A larger diamond might overwhelm a small hand, while a smaller one might not stand out on a giant finger.

Personal Preference: Ultimately, the perfect size depends on your taste. Are you looking for a bold statement piece or a more subtle sparkle?

Beyond Carat Weight: The Importance of Cut

A well-cut princess diamond resembles a star in the night sky—it dazzles with brilliance, fire, and scintillation (that's the fancy term for the beautiful play of light). So, let's explore some key aspects you should consider when evaluating the cut:

Depth: This refers to how thick the diamond is compared to its width. Aim for a depth percentage between 60% and 75% to achieve that perfect princess cut sparkle.

Table Percentage: Imagine the top flat part of the diamond—that's the table. To ensure your diamond reflects light just right, look for a balanced table percentage, ideally between 60% and 75%.

Symmetry and Polish are like the cherry on top! Symmetry ensures balance, while polish dictates the smoothness of the facets. Opt for excellent or very good grades in both categories for that extra sparkle and shine.

How can I optimize my princess-cut diamond beyond the basics?

Choosing the ideal princess cut diamond goes beyond size and cut quality. Let's delve into additional factors that enhance your chosen stone:

Clarity refers to the presence or absence of inclusions (internal flaws) and blemishes (external surface imperfections) within the diamond. While some clarity grades are virtually invisible to the naked eye, opting for a higher clarity grade can enhance the brilliance and value of your princess cut.

Color: Diamonds are graded on a color scale ranging from D (colorless) to Z (light yellow). While colorless diamonds command a premium price, near-colorless (grades E and F) stones offer excellent value and appear white and brilliant to the untrained eye.

The Princess Cut: A Timeless Enchantment

With its captivating geometry and brilliant sparkle, the princess cut diamond offers a unique and unforgettable expression of love. You can embark on a confident and informed diamond-buying journey by utilizing our princess-cut diamond size chart (MM to Carat) and the additional insights provided.

Remember, the perfect diamond isn't just about size; it's about finding a stone that speaks to your heart and reflects your style. Whether you desire a dazzling statement piece or a more subtle sparkle, the princess cut offers timeless elegance that will captivate for generations.

Beyond the Ring: The Versatility of the Princess Cut

The brilliance and geometric appeal of the princess cut extend beyond engagement rings. This versatile cut shines in various jewelry pieces, including:

Earrings: Princess-cut diamond earrings exude sophistication, adding a touch of modern elegance to any outfit.

Pendants: A princess-cut diamond pendant creates a stunning focal point, perfect for showcasing the captivating fire and sparkle of the stone.

Necklaces: A princess-cut diamond necklace adds luxury and timeless style, leaving a lasting impression on any occasion.

Bracelets: Princess-cut diamond bracelets offer dazzling sophistication, adding brilliance to your wrist.

With its captivating beauty and versatility, the princess cut diamond can be the cornerstone of a cherished jewelry collection, a treasure to be enjoyed for a lifetime.


Navigating the world of diamond shopping can be daunting, but understanding the Princess Cut Diamond Size Chart can simplify the process. By deciphering the relationship between millimeter measurements and carat weight, shoppers can make informed decisions when selecting the perfect princess-cut diamond for their needs. Whether you prioritize size, quality, or budget, the Princess Cut Diamond Size Chart is valuable for guiding your diamond-buying journey. With knowledge and insight, you can search for the perfect princess-cut diamond confidently and clearly.


Q.1. What is a Princess Cut Diamond Size Chart?
It's a visual guide showing how millimeter measurements relate to the carat weight of princess cut diamonds.

Q.2. Why is understanding the princess cut diamond size chart important?
It helps buyers choose the right diamond size based on MM measurements and carat weight.

Q.3. How Does the MM to Carat Conversion Work?
It helps buyers accurately assess diamond size by understanding the relationship between MM measurements and carat weight.

Q.4. What Should I Prioritize When Choosing a Princess Cut Diamond?
Consider factors like cut grade, color, clarity, and budget alongside carat weight.

Q.5. How Can I Ensure I'm Making a Confident Decision About Buying a Princess Cut Diamond?
Use insights from the Princess Cut Diamond Size Chart and seek guidance from reputable jewelers to ensure a satisfying buying experience.