Round Diamond Size Chart
Want to know the actual size of a 1 carat diamond on a hand? Use our diamond size chart to understand the millimeter (mm) size of each diamond shape.


Love Stories with Brilliance Hear from Our Happy Couples
Great Price
Great price and my ring was beautiful and just as described. I was nervous to make such a big purchase online but had no issues.
Beautiful 1.41ct Pear
I purchased a beautiful 1.41ct pear from Brilliance and had it set locally. I’d definitely recommend Brilliance to my friends and family!!
Best Price & Quality
Best price and quality for wholesale Diamonds. I’m a jeweler and this is my go to place for custom wedding rings, pendants and jewelry.
The Ring Is Beautiful
AMAZING!! The ring is beautiful!! Exactly what was shown and the quality is EXCELLENT! Very happy with our Brilliance purchase and will be back!!
Beyond My Expectations
Absolutely stunning diamond. The diamond engagement ring that I purchased was beyond my expectations, I would buy here again without hesitation.
Customer Care Was Fantastic
Beautiful diamond with excellent quality. The customer care was fantastic and quick to answer and questions as well as address any concerns! Thank you!!
Would Recommend
I bought a ring online for the first time. Ring was absolutely as advertised and came with promised documents. Customer service was great.
Super Responsive & Quick
We loved picking out our ring. When we had questions they were super responsive and quick to help. Will buy from again!
The Quality Is Perfect
Absolutely the best experience ive ever had. My fiance loves her ring, the quality is perfect, the timing was as promised. I will be back.
Excellent Price, Quality Products
Excellent price, quality products and shipped in a crunch time frame. Outstanding customer service followups to ensure delivery was in time.
Great Price
Great price and my ring was beautiful and just as described. I was nervous to make such a big purchase online but had no issues.
Beautiful 1.41ct Pear
I purchased a beautiful 1.41ct pear from Brilliance and had it set locally. I’d definitely recommend Brilliance to my friends and family!!
Best Price & Quality
Best price and quality for wholesale Diamonds. I’m a jeweler and this is my go to place for custom wedding rings, pendants and jewelry.
The Ring Is Beautiful
AMAZING!! The ring is beautiful!! Exactly what was shown and the quality is EXCELLENT! Very happy with our Brilliance purchase and will be back!!
Beyond My Expectations
Absolutely stunning diamond. The diamond engagement ring that I purchased was beyond my expectations, I would buy here again without hesitation.
Customer Care Was Fantastic
Beautiful diamond with excellent quality. The customer care was fantastic and quick to answer and questions as well as address any concerns! Thank you!!
Diamond Education
Begin your journey with our comprehensive online diamond education, and when you`re ready, our team of experts is here to answer your more detailed questions.


Your Ring, Your Story
Create an engagement ring that celebrates your love and lifelong commitment. At Brilliance, every ring is meticulously handcrafted by our skilled artisans just for you.
Brilliance Diamond Experts,
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We are available 24/7 to answer all your questions.
CHAT NOWDiamond Size FAQ
Diamond size is measured by carat weight, a unit equal to 0.2 grams. However, size is more accurately and indeed defined by its dimensions, such as length, width, and depth in millimeters. A diamond`s diameter (top of the diamond) can indicate its apparent size (especially when comparing two like diamonds).
No, other factors such as cut, shape, and setting can affect a diamond`s size. A well-cut diamond can appear more significant than its actual carat weight suggests, while a poorly cut diamond may look more petite.
Yes, some shapes like the oval, marquise, and pear can appear larger per carat than more compact shapes like round or princess cuts. This is due to the elongated shape and larger surface area.
Halo diamond settings surrounding the center diamond with smaller diamonds can make the central stone appear more prominent. Bezel and prong settings can also affect how the diamond`s size is perceived. Lastly, setting a diamond in a petite or skinny band can help make your diamond appear larger.
Carat weight refers to the weight of a single diamond, while total carat weight (TCW) includes the combined weight of all the diamonds in a piece of jewelry, such as a ring with a center diamond and side stones.
Generally, the price of a diamond increases exponentially with its size, assuming that all other quality factors (cut, color, and clarity) remain constant. Larger diamonds are rarer and, therefore, more expensive.
Yes, cut quality and shape can make two diamonds of the same carat weight look different in size. A deep-cut diamond may carry more weight "hidden" in the depth, making it look smaller when viewed from above.
This largely depends on personal preference. Some people prioritize size and are willing to compromise on quality, while others prefer a smaller, high-quality diamond with better brilliance and fire. Finding the right balance that suits your taste and budget is essential.
It`s crucial to look at the dimensions (length, width, depth) provided and not just the carat weight. Many websites offer actual size views or size comparison tools. Additionally, consider asking for images or videos that show the diamond next to an everyday object for scale.
Large diamonds are more likely to be scrutinized for ethical sourcing due to their higher value. Make sure to inquire about the origin of the diamond and whether it is conflict-free. Some people opt for lab-grown diamonds as a more ethical choice, especially for larger stones.
Brilliance Diamond Experts,
Always Here For You
We are available 24/7 to answer all your questions.
CHAT NOW