Emerald-cut Tanzanite Size Chart
Carat to mm size chart for emerald-cut Tanzanite, 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:
Tanzanite Size Chart (Emerald Cut)
0.25ct
4.27×3.16 mm
4.27×3.16 mm
0.5ct
5.37×3.98 mm
5.37×3.98 mm
0.75ct
6.16×4.56 mm
6.16×4.56 mm
1ct
6.78×5.02 mm
6.78×5.02 mm
1.25ct
7.3×5.41 mm
7.3×5.41 mm
1.5ct
7.75×5.74 mm
7.75×5.74 mm
1.75ct
8.17×6.05 mm
8.17×6.05 mm
2ct
8.53×6.32 mm
8.53×6.32 mm
2.5ct
9.19×6.81 mm
9.19×6.81 mm
3ct
9.77×7.24 mm
9.77×7.24 mm
3.5ct
10.29×7.62 mm
10.29×7.62 mm
4ct
10.76×7.97 mm
10.76×7.97 mm
4.5ct
11.18×8.28 mm
11.18×8.28 mm
5ct
11.58×8.58 mm
11.58×8.58 mm
5.5ct
11.96×8.86 mm
11.96×8.86 mm
6ct
12.31×9.12 mm
12.31×9.12 mm
6.5ct
12.64×9.36 mm
12.64×9.36 mm
7ct
12.96×9.6 mm
12.96×9.6 mm
7.5ct
13.26×9.82 mm
13.26×9.82 mm
8ct
13.55×10.04 mm
13.55×10.04 mm
8.5ct
13.82×10.24 mm
13.82×10.24 mm
9ct
14.09×10.44 mm
14.09×10.44 mm
9.5ct
14.35×10.63 mm
14.35×10.63 mm
10ct
14.59×10.81 mm
14.59×10.81 mm
11ct
15.07×11.16 mm
15.07×11.16 mm
12ct
15.51×11.49 mm
15.51×11.49 mm
13ct
15.93×11.8 mm
15.93×11.8 mm
14ct
16.32×12.09 mm
16.32×12.09 mm
15ct
16.71×12.38 mm
16.71×12.38 mm
16ct
17.06×12.64 mm
17.06×12.64 mm
17ct
17.42×12.9 mm
17.42×12.9 mm
18ct
17.75×13.15 mm
17.75×13.15 mm
19ct
18.08×13.39 mm
18.08×13.39 mm
20ct
18.39×13.62 mm
18.39×13.62 mm
22ct
18.98×14.06 mm
18.98×14.06 mm
24ct
19.53×14.47 mm
19.53×14.47 mm
26ct
20.07×14.87 mm
20.07×14.87 mm
28ct
20.57×15.24 mm
20.57×15.24 mm
30ct
21.05×15.59 mm
21.05×15.59 mm
33ct
21.74×16.1 mm
21.74×16.1 mm
36ct
22.37×16.57 mm
22.37×16.57 mm
40ct
23.17×17.16 mm
23.17×17.16 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 Tanzanite carat weights to their approximate millimeter (mm) sizes:
| Carat Weight | MM Size |
|---|---|
| 0.25 ct | 4.27×3.16 mm |
| 0.5 ct | 5.37×3.98 mm |
| 0.75 ct | 6.16×4.56 mm |
| 1 ct | 6.78×5.02 mm |
| 1.25 ct | 7.3×5.41 mm |
| 1.5 ct | 7.75×5.74 mm |
| 1.75 ct | 8.17×6.05 mm |
| 2 ct | 8.53×6.32 mm |
| 2.5 ct | 9.19×6.81 mm |
| 3 ct | 9.77×7.24 mm |
| 3.5 ct | 10.29×7.62 mm |
| 4 ct | 10.76×7.97 mm |
| 4.5 ct | 11.18×8.28 mm |
| 5 ct | 11.58×8.58 mm |
| 5.5 ct | 11.96×8.86 mm |
| 6 ct | 12.31×9.12 mm |
| 6.5 ct | 12.64×9.36 mm |
| 7 ct | 12.96×9.6 mm |
| 7.5 ct | 13.26×9.82 mm |
| 8 ct | 13.55×10.04 mm |
| 8.5 ct | 13.82×10.24 mm |
| Carat Weight | MM Size |
|---|---|
| 9 ct | 14.09×10.44 mm |
| 9.5 ct | 14.35×10.63 mm |
| 10 ct | 14.59×10.81 mm |
| 11 ct | 15.07×11.16 mm |
| 12 ct | 15.51×11.49 mm |
| 13 ct | 15.93×11.8 mm |
| 14 ct | 16.32×12.09 mm |
| 15 ct | 16.71×12.38 mm |
| 16 ct | 17.06×12.64 mm |
| 17 ct | 17.42×12.9 mm |
| 18 ct | 17.75×13.15 mm |
| 19 ct | 18.08×13.39 mm |
| 20 ct | 18.39×13.62 mm |
| 22 ct | 18.98×14.06 mm |
| 24 ct | 19.53×14.47 mm |
| 26 ct | 20.07×14.87 mm |
| 28 ct | 20.57×15.24 mm |
| 30 ct | 21.05×15.59 mm |
| 33 ct | 21.74×16.1 mm |
| 36 ct | 22.37×16.57 mm |
| 40 ct | 23.17×17.16 mm |