Cushion 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
Easy Purchase Process
Quick responses via customer service. Easy purchase process. I’ve already recommended Brilliance to several friends!
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 Jewelry Is Exquisite
The jewelry is exquisite. Order tracked through Brilliance through delivery. If you’re thinking of ordering a lab made diamond this is your place.
Exactly What I Wanted
I ordered my husbands ring from brilliance and was very pleased. Came in a timely fashion and looks great. Exactly what I wanted.
He Just Loves It
I bought my husband’s wedding ring from Brilliance. We picked it out together and he just loves it. I love seeing it on his left hand.
Exceptional Pricing
Brilliance had exceptional pricing on both their diamonds and their settings. It took a few weeks to receive my ring, but it is perfect. I highly recommend!
The Best Online Experience
Brillance by far is the best online experience that I have come across. My husband enjoys the ring that I purchased. I will defintely recommend to others!
Prettier Than I Thought
Got some Melee diamonds to add to a silver pendant I been working on, and they came prettier than I thought, and I can’t wait to purchase more diamonds!
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!!
Great Communication
Great experience overall. She is very happy with the ring and the process was very simple. Great communication and customer service.
Easy Purchase Process
Quick responses via customer service. Easy purchase process. I’ve already recommended Brilliance to several friends!
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 Jewelry Is Exquisite
The jewelry is exquisite. Order tracked through Brilliance through delivery. If you’re thinking of ordering a lab made diamond this is your place.
Exactly What I Wanted
I ordered my husbands ring from brilliance and was very pleased. Came in a timely fashion and looks great. Exactly what I wanted.
He Just Loves It
I bought my husband’s wedding ring from Brilliance. We picked it out together and he just loves it. I love seeing it on his left hand.
Exceptional Pricing
Brilliance had exceptional pricing on both their diamonds and their settings. It took a few weeks to receive my ring, but it is perfect. I highly recommend!
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,
Always Here For You
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