Emerald-cut Diamond Size Chart
Carat to mm size chart for emerald-cut Diamond, from 0.25ct to 40ct (at an L/W ratio of 1.35). The chart is interactive, meaning you can click on any stone to view it directly in the size simulator.
Gem sizes are shown in actual, real-world size, provided your device screen size is in diagonal. If this is not correct, change it here:
Gem sizes are shown in actual, real-world size, provided your device screen size is in diagonal. If this is not correct, change it here:
Actual size is set for screen
Gemstone:
Shape:
Diamond Size Chart (Emerald Cut)
0.25ct
4.21×3.12 mm
4.21×3.12 mm
0.5ct
5.31×3.93 mm
5.31×3.93 mm
0.75ct
6.08×4.5 mm
6.08×4.5 mm
1ct
6.68×4.95 mm
6.68×4.95 mm
1.25ct
7.2×5.33 mm
7.2×5.33 mm
1.5ct
7.65×5.67 mm
7.65×5.67 mm
1.75ct
8.05×5.96 mm
8.05×5.96 mm
2ct
8.42×6.24 mm
8.42×6.24 mm
2.5ct
9.07×6.72 mm
9.07×6.72 mm
3ct
9.64×7.14 mm
9.64×7.14 mm
3.5ct
10.14×7.51 mm
10.14×7.51 mm
4ct
10.61×7.86 mm
10.61×7.86 mm
4.5ct
11.03×8.17 mm
11.03×8.17 mm
5ct
11.42×8.46 mm
11.42×8.46 mm
5.5ct
11.8×8.74 mm
11.8×8.74 mm
6ct
12.14×8.99 mm
12.14×8.99 mm
6.5ct
12.47×9.24 mm
12.47×9.24 mm
7ct
12.78×9.47 mm
12.78×9.47 mm
7.5ct
13.08×9.69 mm
13.08×9.69 mm
8ct
13.37×9.9 mm
13.37×9.9 mm
8.5ct
13.64×10.1 mm
13.64×10.1 mm
9ct
13.89×10.29 mm
13.89×10.29 mm
9.5ct
14.15×10.48 mm
14.15×10.48 mm
10ct
14.39×10.66 mm
14.39×10.66 mm
11ct
14.86×11.01 mm
14.86×11.01 mm
12ct
15.3×11.33 mm
15.3×11.33 mm
13ct
15.71×11.64 mm
15.71×11.64 mm
14ct
16.11×11.93 mm
16.11×11.93 mm
15ct
16.48×12.21 mm
16.48×12.21 mm
16ct
16.83×12.47 mm
16.83×12.47 mm
17ct
17.19×12.73 mm
17.19×12.73 mm
18ct
17.51×12.97 mm
17.51×12.97 mm
19ct
17.83×13.21 mm
17.83×13.21 mm
20ct
18.13×13.43 mm
18.13×13.43 mm
22ct
18.72×13.87 mm
18.72×13.87 mm
24ct
19.28×14.28 mm
19.28×14.28 mm
26ct
19.79×14.66 mm
19.79×14.66 mm
28ct
20.29×15.03 mm
20.29×15.03 mm
30ct
20.76×15.38 mm
20.76×15.38 mm
33ct
21.42×15.87 mm
21.42×15.87 mm
36ct
22.06×16.34 mm
22.06×16.34 mm
40ct
22.86×16.93 mm
22.86×16.93 mm
Length-to-width ratio: 1.35, Color:
Download Chart
Note: If you want to cut out the shapes and try them on your finger, print out the PDF chart. The image (png) chart will not print at actual size.
Carat-to-MM Conversion Table
Use this conversion table to quickly convert emerald-cut Diamond carat weights to their approximate millimeter (mm) sizes:
| Carat Weight | MM Size |
|---|---|
| 0.25 ct | 4.21×3.12 mm |
| 0.5 ct | 5.31×3.93 mm |
| 0.75 ct | 6.08×4.5 mm |
| 1 ct | 6.68×4.95 mm |
| 1.25 ct | 7.2×5.33 mm |
| 1.5 ct | 7.65×5.67 mm |
| 1.75 ct | 8.05×5.96 mm |
| 2 ct | 8.42×6.24 mm |
| 2.5 ct | 9.07×6.72 mm |
| 3 ct | 9.64×7.14 mm |
| 3.5 ct | 10.14×7.51 mm |
| 4 ct | 10.61×7.86 mm |
| 4.5 ct | 11.03×8.17 mm |
| 5 ct | 11.42×8.46 mm |
| 5.5 ct | 11.8×8.74 mm |
| 6 ct | 12.14×8.99 mm |
| 6.5 ct | 12.47×9.24 mm |
| 7 ct | 12.78×9.47 mm |
| 7.5 ct | 13.08×9.69 mm |
| 8 ct | 13.37×9.9 mm |
| 8.5 ct | 13.64×10.1 mm |
| Carat Weight | MM Size |
|---|---|
| 9 ct | 13.89×10.29 mm |
| 9.5 ct | 14.15×10.48 mm |
| 10 ct | 14.39×10.66 mm |
| 11 ct | 14.86×11.01 mm |
| 12 ct | 15.3×11.33 mm |
| 13 ct | 15.71×11.64 mm |
| 14 ct | 16.11×11.93 mm |
| 15 ct | 16.48×12.21 mm |
| 16 ct | 16.83×12.47 mm |
| 17 ct | 17.19×12.73 mm |
| 18 ct | 17.51×12.97 mm |
| 19 ct | 17.83×13.21 mm |
| 20 ct | 18.13×13.43 mm |
| 22 ct | 18.72×13.87 mm |
| 24 ct | 19.28×14.28 mm |
| 26 ct | 19.79×14.66 mm |
| 28 ct | 20.29×15.03 mm |
| 30 ct | 20.76×15.38 mm |
| 33 ct | 21.42×15.87 mm |
| 36 ct | 22.06×16.34 mm |
| 40 ct | 22.86×16.93 mm |