Oval-cut Spinel Size Chart
Carat to mm size chart for oval-cut Spinel, 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:
Spinel Size Chart (Oval Cut)
0.25ct
5.01×3.34 mm
5.01×3.34 mm
0.5ct
6.3×4.2 mm
6.3×4.2 mm
0.75ct
7.22×4.81 mm
7.22×4.81 mm
1ct
7.94×5.29 mm
7.94×5.29 mm
1.25ct
8.55×5.7 mm
8.55×5.7 mm
1.5ct
9.09×6.06 mm
9.09×6.06 mm
1.75ct
9.57×6.38 mm
9.57×6.38 mm
2ct
10.01×6.67 mm
10.01×6.67 mm
2.5ct
10.79×7.19 mm
10.79×7.19 mm
3ct
11.46×7.64 mm
11.46×7.64 mm
3.5ct
12.06×8.04 mm
12.06×8.04 mm
4ct
12.6×8.4 mm
12.6×8.4 mm
4.5ct
13.11×8.74 mm
13.11×8.74 mm
5ct
13.58×9.05 mm
13.58×9.05 mm
5.5ct
14.03×9.35 mm
14.03×9.35 mm
6ct
14.43×9.62 mm
14.43×9.62 mm
6.5ct
14.82×9.88 mm
14.82×9.88 mm
7ct
15.2×10.13 mm
15.2×10.13 mm
7.5ct
15.54×10.36 mm
15.54×10.36 mm
8ct
15.89×10.59 mm
15.89×10.59 mm
8.5ct
16.2×10.8 mm
16.2×10.8 mm
9ct
16.52×11.01 mm
16.52×11.01 mm
9.5ct
16.82×11.21 mm
16.82×11.21 mm
10ct
17.12×11.41 mm
17.12×11.41 mm
11ct
17.66×11.77 mm
17.66×11.77 mm
12ct
18.18×12.12 mm
18.18×12.12 mm
13ct
18.68×12.45 mm
18.68×12.45 mm
14ct
19.14×12.76 mm
19.14×12.76 mm
15ct
19.59×13.06 mm
19.59×13.06 mm
16ct
20.01×13.34 mm
20.01×13.34 mm
17ct
20.42×13.61 mm
20.42×13.61 mm
18ct
20.81×13.87 mm
20.81×13.87 mm
19ct
21.2×14.13 mm
21.2×14.13 mm
20ct
21.56×14.37 mm
21.56×14.37 mm
22ct
22.25×14.83 mm
22.25×14.83 mm
24ct
22.91×15.27 mm
22.91×15.27 mm
26ct
23.52×15.68 mm
23.52×15.68 mm
28ct
24.12×16.08 mm
24.12×16.08 mm
30ct
24.68×16.45 mm
24.68×16.45 mm
33ct
25.47×16.98 mm
25.47×16.98 mm
36ct
26.22×17.48 mm
26.22×17.48 mm
40ct
27.17×18.11 mm
27.17×18.11 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 Spinel carat weights to their approximate millimeter (mm) sizes:
| Carat Weight | MM Size |
|---|---|
| 0.25 ct | 5.01×3.34 mm |
| 0.5 ct | 6.3×4.2 mm |
| 0.75 ct | 7.22×4.81 mm |
| 1 ct | 7.94×5.29 mm |
| 1.25 ct | 8.55×5.7 mm |
| 1.5 ct | 9.09×6.06 mm |
| 1.75 ct | 9.57×6.38 mm |
| 2 ct | 10.01×6.67 mm |
| 2.5 ct | 10.79×7.19 mm |
| 3 ct | 11.46×7.64 mm |
| 3.5 ct | 12.06×8.04 mm |
| 4 ct | 12.6×8.4 mm |
| 4.5 ct | 13.11×8.74 mm |
| 5 ct | 13.58×9.05 mm |
| 5.5 ct | 14.03×9.35 mm |
| 6 ct | 14.43×9.62 mm |
| 6.5 ct | 14.82×9.88 mm |
| 7 ct | 15.2×10.13 mm |
| 7.5 ct | 15.54×10.36 mm |
| 8 ct | 15.89×10.59 mm |
| 8.5 ct | 16.2×10.8 mm |
| Carat Weight | MM Size |
|---|---|
| 9 ct | 16.52×11.01 mm |
| 9.5 ct | 16.82×11.21 mm |
| 10 ct | 17.12×11.41 mm |
| 11 ct | 17.66×11.77 mm |
| 12 ct | 18.18×12.12 mm |
| 13 ct | 18.68×12.45 mm |
| 14 ct | 19.14×12.76 mm |
| 15 ct | 19.59×13.06 mm |
| 16 ct | 20.01×13.34 mm |
| 17 ct | 20.42×13.61 mm |
| 18 ct | 20.81×13.87 mm |
| 19 ct | 21.2×14.13 mm |
| 20 ct | 21.56×14.37 mm |
| 22 ct | 22.25×14.83 mm |
| 24 ct | 22.91×15.27 mm |
| 26 ct | 23.52×15.68 mm |
| 28 ct | 24.12×16.08 mm |
| 30 ct | 24.68×16.45 mm |
| 33 ct | 25.47×16.98 mm |
| 36 ct | 26.22×17.48 mm |
| 40 ct | 27.17×18.11 mm |