Choosing the perfect stone for your engagement ring can be an exciting yet stressful task. With various options available, such as lab grown diamonds, diamond simulants, and moissanite, it’s essential to select the right stone type that suits your taste, style, and budget. Utilizing a diamond size chart can simplify this process, making it easier to find the perfect stone for your ring.
Round
Princess
Asscher
Cushion
Oval
Radiant
Emerald
Pear
Heart
Marquise
Triangle
Trillion
Baguette
Tapered Baguette
Round Cut
MM Size | Carat Weight |
0.8 | 0.0025 |
1 | 0.005 |
1.10 | 0.0075 |
1.15 | 0.0067 |
1.25 | 0.01 |
1.3 | 0.01 |
1.5 | 0.015 |
1.75 | 0.02 |
1.8 | 0.025 |
2 | 0.03 |
2.25 | 0.04 |
2.5 | 0.06 |
2.75 | 0.08 |
3 | 0.11 |
3.25 | 0.14 |
3.5 | 0.17 |
3.75 | 0.21 |
4 | 0.25 |
4.25 | 0.28 |
4.5 | 0.36 |
4.75 | 0.44 |
5 | 0.46 |
5.25 | 0.56 |
5.5 | 0.66 |
5.75 | 0.76 |
6 | 0.84 |
6.25 | 0.93 |
6.5 | 1.03 |
6.75 | 1.24 |
MM Size | Carat Weight |
7 | 1.28 |
7.25 | 1.49 |
7.5 | 1.67 |
7.75 | 1.75 |
8 | 2.04 |
8.25 | 2.11 |
8.5 | 2.43 |
8.75 | 2.55 |
9 | 2.75 |
9.25 | 3.05 |
9.5 | 3.35 |
9.75 | 3.61 |
10 | 3.87 |
10.25 | 4.16 |
10.5 | 4.41 |
10.75 | 4.57 |
11 | 4.91 |
11.25 | 5.49 |
11.5 | 5.85 |
12 | 6.84 |
12.25 | 7.26 |
12.5 | 7.36 |
12.75 | 7.52 |
13 | 8.51 |
13.5 | 9.53 |
14 | 10.49 |
15 | 12.89 |
16 | 16.06 |
Princess / Square Cut
MM Size | Carat Weight |
1.5 | 0.015 |
1.75 | 0.03 |
2 | 0.06 |
2.25 | 0.08 |
2.5 | 0.1 |
2.75 | 0.13 |
3 | 0.18 |
3.25 | 0.26 |
3.5 | 0.29 |
3.75 | 0.31 |
4 | 0.39 |
4.25 | 0.44 |
4.5 | 0.56 |
4.75 | 0.64 |
5 | 0.71 |
5.25 | 0.75 |
5.5 | 0.99 |
5.75 | 1.11 |
6 | 1.24 |
6.25 | 1.39 |
MM Size | Carat Weight |
6.5 | 1.59 |
6.75 | 1.75 |
7 | 1.96 |
7.25 | 2.01 |
7.5 | 2.4 |
7.75 | 2.74 |
8 | 3.01 |
8.25 | 3.24 |
8.5 | 3.67 |
8.75 | 4.1 |
9 | 4.12 |
9.5 | 5.09 |
9.75 | 5.36 |
10 | 5.62 |
10.25 | 5.76 |
10.5 | 5.99 |
11 | 7.44 |
11.5 | 9.44 |
12 | 9.52 |
Asscher Cut
MM Size | Carat Weight |
4 | 0.39 |
4.5 | 0.56 |
5 | 0.71 |
5.5 | 0.99 |
6 | 1.24 |
6.5 | 1.59 |
7 | 1.96 |
7.5 | 2.4 |
MM Size | Carat Weight |
8 | 3.01 |
8.5 | 3.67 |
9 | 4.12 |
9.5 | 5.09 |
10 | 5.62 |
11 | 7.44 |
12 | 9.52 |
13 | 12.66 |
Marquise Cut
MM Size | Carat Weight |
3 x 1.5 | 0.025 |
3.5 x 1.75 | 0.065 |
3.5 x 2 | 0.07 |
3.75 x 1.75 | 0.11 |
4 x 2 | 0.1 |
4.25 x 2.25 | 0.12 |
5 x 2.5 | 0.14 |
5 x 3 | 0.2 |
5.5 x 2.75 | 0.16 |
5.5 x 3 | 0.18 |
6 x 3 | 0.25 |
6.5 x 3 | 0.23 |
7 x 3 | 0.3 |
7 x 3.5 | .35 |
7 x 4 | 3.4 |
7.5 x 3.5 | 0.33 |
8 x 4 | 0.47 |
9 x 4.5 | 0.71 |
MM Size | Carat Weight |
9 x 5 | 0.76 |
9.5 x 5 | 0.85 |
10 x 5 | 0.95 |
11 x 5.5 | 1.25 |
11.5 x 6 | 1.33 |
12 x 6 | 1.62 |
12 x 6.5 | 1.71 |
13 x 6.5 | 2.11 |
14 x 7 | 2.48 |
15 x 7.5 | 3.09 |
14 x 8 | 3 |
15 x 7 | 3.12 |
15 x 8 | 3.44 |
16 x 8 | 3.86 |
17 x 8.5 | 4.88 |
17.5 x 10 | 5.5 |
20 x 8 | 7.08 |
20 x 10 | 7.94 |
20 x 11 | 9.5 |
Radiant Cut
MM Size | Carat Weight |
4.5 x 3.5 | 0.34 |
5 x 3 | 0.31 |
6 x 3 | 0.41 |
6 x 4 | .60 |
6.5 x 4.5 | 0.83 |
7 x 5 | 1.14 |
7.25 x 5.25 | 1.24 |
7.5 x 5.5 | 1.47 |
8 x 6 | 1.74 |
8.5 x 6.5 | 2.25 |
9 x 7 | 2.62 |
9.5 x 7.5 | 3.18 |
10 x 7 | 3.31 |
MM Size | Carat Weight |
10 x 8 | 3.49 |
11 x 9 | 5.05 |
11.5 x 10 | 6.45 |
12 x 9 | 6.06 |
12 x 10 | 6.79 |
13 x 9 | 6.54 |
13 x 11 | 9.33 |
13.5 x 11.5 | 10.19 |
14 x 10 | 8.47 |
14 x 12 | 12.14 |
15 x 11 | 11.48 |
16 x 12 | 14.22 |
Cushion Cut
MM Size | Carat Weight |
4 | 0.25 |
4.5 | 0.36 |
5 | 0.46 |
5.25 | 0.56 |
5.5 | 0.66 |
5.75 | 0.76 |
6 | 0.84 |
6.25 | 0.93 |
6.5 | 1.03 |
6.75 | 1.24 |
7 | 1.28 |
7.5 | 1.67 |
MM Size | Carat Weight |
8 | 2.04 |
8.5 | 2.43 |
9 | 2.75 |
9.5 | 3.35 |
10 | 3.87 |
10.5 | 4.41 |
11 | 4.91 |
11.5 | 5.85 |
12 | 6.84 |
13 | 8.51 |
14 | 10.49 |
15 | 12.89 |
Pear Cut
MM Size | Carat Weight |
3 x 2 | 0.13 |
4 x 2.5 | 0.18 |
4 x 3 | 0.21 |
5 x 3 | 0.25 |
5 x 4 | 0.35 |
6 x 4 | 0.39 |
6.5 x 4.5 | 0.57 |
7 x 5 | 0.71 |
8 x 5 | 0.81 |
8.5 x 5.5 | 1.08 |
8 x 6 | 1.25 |
9 x 6 | 1.33 |
9 x 7 | 1.75 |
10 x 6 | 1.71 |
10 x 7 | 1.8 |
10 x 8 | 2.46 |
11 x 7.50 | 2.61 |
11 x 8 | 3 |
12 x 7 | 3.12 |
MM Size | Carat Weight |
12 x 8 | 3 |
12 x 9 | 3.44 |
13 x 8 | 2.98 |
14 x 8 | 3.47 |
13 x 9 | 4.11 |
14 x 9 | 4.25 |
15 x 9 | 5.06 |
14 x 10 | 5.41 |
13 x 11 | 5.65 |
15 x 10 | 5.75 |
15 x 11 | 7.36 |
16 x 9 | 5.86 |
16 x 10 | 6.27 |
16 x 12 | 8.99 |
17 x 10 | 6.46 |
18 x 11 | 8.14 |
18 x 12 | 9.35 |
18 x 13 | 10.21 |
Oval Cut
MM Size | Carat Weight |
4.5 x 3.5 | 0.21 |
5 x 3 | 0.21 |
5 x 4 | 0.35 |
5.5 x 3.5 | 0.33 |
6 x 4 | 0.43 |
6.5 x 4.5 | 0.65 |
6 x 5 | 0.61 |
7 x 5 | 0.76 |
7.5 x 5.5 | 0.98 |
8 x 6 | 1.21 |
8.5 x 6.5 | 1.46 |
9 x 6 | 1.41 |
9 x 7 | 1.86 |
MM Size | Carat Weight |
10 x 8 | 2.54 |
10.5 x 8.5 | 2.88 |
11 x 9 | 3.85 |
12 x 8 | 2.99 |
12 x 10 | 5.05 |
14 x 10 | 5.81 |
13 x 11 | 6.05 |
14 x 12 | 8.21 |
15 x 12 | 8.76 |
16 x 12 | 9.32 |
16 x 14 | 11.88 |
18 x 13 | 12.86 |
20 x 15 | 14.96 |
Heart Cut
MM Size | Carat Weight |
3.5 | 0.18 |
4 | 0.25 |
4.25 | 0.28 |
4.5 | 0.34 |
4.75 | 0.38 |
5 | 0.44 |
5.5 | 0.61 |
6 | 0.74 |
6.25 | 0.83 |
6.5 | 0.93 |
7 | 1.13 |
7.5 | 1.59 |
MM Size | Carat Weight |
8 | 1.71 |
9 | 2.41 |
9.5 | 2.9 |
10 | 3.16 |
11 | 4.41 |
12 | 5.66 |
13 | 7.88 |
14 | 9.38 |
15 | 10.79 |
16 | 13.27 |
18 | 15.33 |
Trillion Cut
MM Size | Carat Weight |
3 | 0.12 |
3.5 | 0.16 |
3.75 | 0.19 |
4 | 0.23 |
4.25 | 0.27 |
4.5 | 0.31 |
4.75 | 0.37 |
5 | 0.42 |
5.25 | 0.49 |
5.5 | 0.55 |
5.75 | 0.64 |
6 | 0.7 |
MM Size | Carat Weight |
6.25 | 0.75 |
6.5 | 0.91 |
6.75 | 0.98 |
7 | 1.1 |
7.5 | 1.21 |
8 | 1.75 |
9 | 2.35 |
11 | 3.66 |
12 | 4.9 |
13 | 6.42 |
15 | 9 |
Emerald Cut
MM Size | Carat Weight |
3 x 2 | 0.1 |
3.5 x 2 | 0.12 |
4 x 2 | 0.15 |
4 x 3 | 0.2 |
5 x 3 | 0.29 |
5.5 x 3.5 | 0.46 |
5.5 x 4 | 0.48 |
6 x 4 | 0.66 |
6.5 x 4.5 | 0.88 |
7 x 5 | 1.06 |
7.25 x 5.25 | 1.24 |
7.5 x 5.5 | 1.45 |
8 x 6 | 1.74 |
8.5 x 6.5 | 2.17 |
MM Size | Carat Weight |
9 x 7 | 2.62 |
9.5 x 7.5 | 3.21 |
10 x 7 | 3.01 |
10 x 8 | 3.79 |
11 x 9 | 5.21 |
12 x 8 | 5.34 |
12 x 10 | 6 |
13 x 9 | 6.38 |
14 x 8 | 6.25 |
14 x 10 | 8.48 |
13 x 11 | 9.13 |
14 x 12 | 11.26 |
16 x 12 | 14.22 |
Triangle Cut
MM Size | Carat Weight |
2.5 | 0.08 |
3 | 0.12 |
3.5 | 0.18 |
4 | 0.25 |
4.25 | 0.32 |
4.5 | 0.37 |
4.75 | 0.42 |
5 | 0.45 |
5.25 | 0.53 |
5.5 | 0.66 |
5.75 | 0.71 |
6 | 0.76 |
6.25 | 0.86 |
6.5 | 0.94 |
6.75 | 1.02 |
MM Size | Carat Weight |
7 | 1.11 |
7.25 | 1.32 |
7.5 | 1.45 |
7.75 | 1.69 |
8 | 1.79 |
8.25 | 1.86 |
9 | 2.15 |
9.25 | 2.54 |
9.75 | 3.25 |
10 | 3.52 |
11 | 4.74 |
12 | 6.03 |
13 | 8.12 |
14 | 9.83 |
Baguette Tapered Cut
MM Size | Carat Weight |
2 x 1.5 x 1 | 0.025 |
2.5 x 1.5 x 1 | 0.035 |
2.5 x 1.75 x 1 | 0.04 |
3 x 1.5 x 1 | 0.05 |
3 x 1.75 x 1.25 | 0.055 |
3 x 1.75 x 1.3 | 0.055 |
3 x 1.75 x 1.5 | 0.055 |
3 x 2 x 1 | 0.06 |
3 x 2 x 1.25 | 0.065 |
3 x 2 x 1.5 | 0.07 |
3 x 2 x 1.75 | 0.075 |
3 x 2.5 x 2 | 0.08 |
3.25 x 1.75 x 1 | 0.07 |
3.25 x 1.75 x 1.25 | 0.05 |
3.5 x 1.25 x 1 | 0.04 |
3.5 x 1.5 x 1 | 0.05 |
3.5 x 1.5 x 1.25 | 0.055 |
3.5 x 1.7 x 1.3 | 0.055 |
3.5 x 1.75 x 1 | 0.06 |
3.5 x 1.75 x 1.25 | 0.07 |
3.5 x 1.75 x 1.3 | 0.065 |
3.5 x 2 x 1.25 | 0.08 |
3.5 x 2 x 1.5 | 0.09 |
3.5 x 2.5 x 2 | 0.09 |
3.75 x 2 x 1.25 | 0.08 |
4 x 1.5 x 1 | 0.07 |
4 x 1.5 x 1.2 | 0.08 |
4 x 1.75 x 1.25 | 0.08 |
4 x 2 x 1.5 | 0.1 |
4 x 2.5 x 1.5 | 0.12 |
4 x 2.5 x 2 | 0.21 |
4 x 3 x 2 | 0.21 |
4.25 x 2 x 1.25 | 0.11 |
MM Size | Carat Weight |
4.25 x 2 x 1.5 | 0.13 |
4.25 x 2.5 x 1.25 | 0.13 |
4.25 x 2.5 x 1.5 | 0.135 |
4.5 x 1.75 x 1.25 | 0.15 |
4.5 x 2 x 1.5 | 0.12 |
4.5 x 2.3 x 1.8 | 0.16 |
4.5 x 2.5 x 2 | 0.15 |
4.5 x 2.75 x 1.75 | 0.15 |
4.5 x 3 x 2 | 0.16 |
4.5 x 3 x 2.5 | 0.16 |
4.75 x 2.5 x 1.5 | 0.15 |
4.75 x 3 x 2 | 0.18 |
5 x 2 x 1 | 0.14 |
5 x 2 x 1.25 | 0.15 |
5 x 2 x 1.5 | 0.15 |
5 x 2.3 x 1.8 | 0.16 |
5 x 2.5 x 1.5 | 0.2 |
5 x 2.5 x 2 | 0.21 |
5 x 2.75 x 2 | 0.21 |
5 x 3 x 2 | 0.25 |
5 x 3.5 x 2 | 0.26 |
5 x 4 x 3.5 | 0.28 |
5.5 x 2 x 1.5 | 0.18 |
5.5 x 2.5 x 1.75 | 0.23 |
5.5 x 2.5 x 2 | 0.23 |
5.5 x 3 x 2 | 0.26 |
5.5 x 3 x 2.25 | 0.26 |
5.5 x 4 x 2.5 | 0.28 |
6 x 2 x 1.5 | 0.3 |
6 x 2.5 x 1.5 | 0.3 |
6 x 3 x 2 | 0.3 |
6.5 x 2.5 x 2 | 0.3 |
6.5 x 3 x 2 | 0.32 |
Baguette Straight Cut
MM Size | Carat Weight |
2 x 1 | 0.02 |
2 x 1.5 | 0.04 |
2 x 1.75 | 0.04 |
2.25 x 1.75 | 0.04 |
2.25 x 2 | 0.045 |
2.5 x 1 | 0.045 |
2.5 x 1.25 | 0.047 |
2.5 x 1.5 | 0.05 |
2.5 x 1.75 | 0.055 |
2.5 x 2 | 0.055 |
2.75 x 1.5 | 0.055 |
2.75 x 1.75 | 0.06 |
2.75 x 2 | 0.06 |
2.75 x 2.5 | 0.065 |
3 x 1 | 0.05 |
3 x 1.25 | 0.055 |
3 x 1.5 | 0.06 |
3 x 1.75 | 0.08 |
3 x 2 | 0.1 |
3 x 2.5 | 0.13 |
3.25 x 1.25 | 0.06 |
3.25 x 1.5 | 0.065 |
3.25 x 1.75 | 0.08 |
3.25 x 2.5 | 0.14 |
3.5 x 1 | 0.065 |
3.5 x 1.25 | 0.07 |
3.5 x 1.5 | 0.07 |
3.5 x 1.75 | 0.08 |
3.5 x 2 | 0.13 |
3.5 x 2.5 | 0.15 |
3.5 x 3 | 0.15 |
MM Size | Carat Weight |
3.75 x 1.5 | 0.14 |
3.75 x 2 | 0.145 |
4 x 1.25 | 0.075 |
4 x 1.5 | 0.08 |
4 x 1.75 | 0.11 |
4 x 2 | 0.14 |
4 x 3 | 0.2 |
4.5 x 1.5 | 0.1 |
4.5 x 1.75 | 0.14 |
4.5 x 2 | 0.17 |
4.5 x 2.5 | 0.2 |
4.5 x 3 | 0.285 |
4.5 x 3.5 | 0.3 |
4.75 x 1.5 | 0.27 |
4.75 x 2 | 0.28 |
5 x 1.5 | 0.14 |
5 x 1.75 | 0.15 |
5 x 2 | 0.19 |
5 x 2.5 | 0.24 |
5 x 3 | 0.3 |
5 x 3.5 | 0.33 |
5 x 4 | 0.4 |
5.5 x 1.75 | 0.16 |
5.5 x 2 | 0.18 |
5.5 x 2.5 | 0.23 |
5.5 x 3 | 0.3 |
5.5 x 3.5 | 0.33 |
6 x 1.75 | 0.28 |
6 x 2 | 0.3 |
6 x 2.5 | 0.33 |
6 x 3 | 0.4 |
Designing an engagement ring is a smooth and enjoyable process with the help of a diamond size chart. Begin by selecting your desired shape, keeping in mind that each shape has a unique style, brilliance, and meaning. Whether you prefer a round cut, cushion cut, oval, asscher, emerald, heart, or princess cut stone, there’s a perfect option to suit your taste.
Once you’ve chosen the right shape, it’s time to decide on the perfect carat size for your ring. Utilizing a mm to carat conversion chart can assist you in visualizing the size of diamonds, ensuring you find the ideal stone for your unique piece. That’s not all it can do, an mm size chart can also be helpful when comparing different shapes and sizes, allowing you to be prepared as you go on to create the engagement ring of your dreams.
Lab Grown Diamonds
- Carbon diamonds, grown in a lab.
- Graded and certified by the International Gemological Institute (IGI).
- Conflict free.
The Nexus Diamond™ Alternative
- The world’s first heirloom-quality diamond simulant.
- Flawless, colorless and Ideal Cut as graded by Forever Companies’ stringent code of ethics.
- Simulates the look, feel and wear of diamonds.
Moissanite
- Durable and highly refractive
- Less susceptible to cracking and chipping
- More fire and brilliance than a diamond