Oval-cut Moissanite Size Chart
Carat to mm size chart for oval-cut Moissanite, from 0.25ct to 40ct (at an L/W ratio of 1.5). 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:
Moissanite Size Chart (Oval Cut)
0.25ct
5.19×3.46 mm
5.19×3.46 mm
0.5ct
6.54×4.36 mm
6.54×4.36 mm
0.75ct
7.49×4.99 mm
7.49×4.99 mm
1ct
8.24×5.49 mm
8.24×5.49 mm
1.25ct
8.88×5.92 mm
8.88×5.92 mm
1.5ct
9.44×6.29 mm
9.44×6.29 mm
1.75ct
9.93×6.62 mm
9.93×6.62 mm
2ct
10.38×6.92 mm
10.38×6.92 mm
2.5ct
11.19×7.46 mm
11.19×7.46 mm
3ct
11.88×7.92 mm
11.88×7.92 mm
3.5ct
12.51×8.34 mm
12.51×8.34 mm
4ct
13.08×8.72 mm
13.08×8.72 mm
4.5ct
13.61×9.07 mm
13.61×9.07 mm
5ct
14.1×9.4 mm
14.1×9.4 mm
5.5ct
14.55×9.7 mm
14.55×9.7 mm
6ct
14.97×9.98 mm
14.97×9.98 mm
6.5ct
15.38×10.25 mm
15.38×10.25 mm
7ct
15.77×10.51 mm
15.77×10.51 mm
7.5ct
16.14×10.76 mm
16.14×10.76 mm
8ct
16.49×10.99 mm
16.49×10.99 mm
8.5ct
16.82×11.21 mm
16.82×11.21 mm
9ct
17.15×11.43 mm
17.15×11.43 mm
9.5ct
17.46×11.64 mm
17.46×11.64 mm
10ct
17.76×11.84 mm
17.76×11.84 mm
11ct
18.33×12.22 mm
18.33×12.22 mm
12ct
18.87×12.58 mm
18.87×12.58 mm
13ct
19.38×12.92 mm
19.38×12.92 mm
14ct
19.86×13.24 mm
19.86×13.24 mm
15ct
20.33×13.55 mm
20.33×13.55 mm
16ct
20.78×13.85 mm
20.78×13.85 mm
17ct
21.2×14.13 mm
21.2×14.13 mm
18ct
21.6×14.4 mm
21.6×14.4 mm
19ct
21.99×14.66 mm
21.99×14.66 mm
20ct
22.37×14.91 mm
22.37×14.91 mm
22ct
23.1×15.4 mm
23.1×15.4 mm
24ct
23.78×15.85 mm
23.78×15.85 mm
26ct
24.42×16.28 mm
24.42×16.28 mm
28ct
25.04×16.69 mm
25.04×16.69 mm
30ct
25.61×17.07 mm
25.61×17.07 mm
33ct
26.43×17.62 mm
26.43×17.62 mm
36ct
27.21×18.14 mm
27.21×18.14 mm
40ct
28.19×18.79 mm
28.19×18.79 mm
Length-to-width ratio: 1.5, 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 oval-cut Moissanite carat weights to their approximate millimeter (mm) sizes:
| Carat Weight | MM Size |
|---|---|
| 0.25 ct | 5.19×3.46 mm |
| 0.5 ct | 6.54×4.36 mm |
| 0.75 ct | 7.49×4.99 mm |
| 1 ct | 8.24×5.49 mm |
| 1.25 ct | 8.88×5.92 mm |
| 1.5 ct | 9.44×6.29 mm |
| 1.75 ct | 9.93×6.62 mm |
| 2 ct | 10.38×6.92 mm |
| 2.5 ct | 11.19×7.46 mm |
| 3 ct | 11.88×7.92 mm |
| 3.5 ct | 12.51×8.34 mm |
| 4 ct | 13.08×8.72 mm |
| 4.5 ct | 13.61×9.07 mm |
| 5 ct | 14.1×9.4 mm |
| 5.5 ct | 14.55×9.7 mm |
| 6 ct | 14.97×9.98 mm |
| 6.5 ct | 15.38×10.25 mm |
| 7 ct | 15.77×10.51 mm |
| 7.5 ct | 16.14×10.76 mm |
| 8 ct | 16.49×10.99 mm |
| 8.5 ct | 16.82×11.21 mm |
| Carat Weight | MM Size |
|---|---|
| 9 ct | 17.15×11.43 mm |
| 9.5 ct | 17.46×11.64 mm |
| 10 ct | 17.76×11.84 mm |
| 11 ct | 18.33×12.22 mm |
| 12 ct | 18.87×12.58 mm |
| 13 ct | 19.38×12.92 mm |
| 14 ct | 19.86×13.24 mm |
| 15 ct | 20.33×13.55 mm |
| 16 ct | 20.78×13.85 mm |
| 17 ct | 21.2×14.13 mm |
| 18 ct | 21.6×14.4 mm |
| 19 ct | 21.99×14.66 mm |
| 20 ct | 22.37×14.91 mm |
| 22 ct | 23.1×15.4 mm |
| 24 ct | 23.78×15.85 mm |
| 26 ct | 24.42×16.28 mm |
| 28 ct | 25.04×16.69 mm |
| 30 ct | 25.61×17.07 mm |
| 33 ct | 26.43×17.62 mm |
| 36 ct | 27.21×18.14 mm |
| 40 ct | 28.19×18.79 mm |