Marquise-cut Spinel Size Chart
Carat to mm size chart for marquise-cut Spinel, from 0.25ct to 40ct (at an L/W ratio of 2). 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 (Marquise Cut)
0.25ct
6.34×3.17 mm
6.34×3.17 mm
0.5ct
8×4 mm
8×4 mm
0.75ct
9.14×4.57 mm
9.14×4.57 mm
1ct
10.08×5.04 mm
10.08×5.04 mm
1.25ct
10.84×5.42 mm
10.84×5.42 mm
1.5ct
11.52×5.76 mm
11.52×5.76 mm
1.75ct
12.14×6.07 mm
12.14×6.07 mm
2ct
12.68×6.34 mm
12.68×6.34 mm
2.5ct
13.66×6.83 mm
13.66×6.83 mm
3ct
14.52×7.26 mm
14.52×7.26 mm
3.5ct
15.28×7.64 mm
15.28×7.64 mm
4ct
15.98×7.99 mm
15.98×7.99 mm
4.5ct
16.62×8.31 mm
16.62×8.31 mm
5ct
17.22×8.61 mm
17.22×8.61 mm
5.5ct
17.78×8.89 mm
17.78×8.89 mm
6ct
18.3×9.15 mm
18.3×9.15 mm
6.5ct
18.8×9.4 mm
18.8×9.4 mm
7ct
19.26×9.63 mm
19.26×9.63 mm
7.5ct
19.72×9.86 mm
19.72×9.86 mm
8ct
20.14×10.07 mm
20.14×10.07 mm
8.5ct
20.56×10.28 mm
20.56×10.28 mm
9ct
20.94×10.47 mm
20.94×10.47 mm
9.5ct
21.32×10.66 mm
21.32×10.66 mm
10ct
21.7×10.85 mm
21.7×10.85 mm
11ct
22.4×11.2 mm
22.4×11.2 mm
12ct
23.06×11.53 mm
23.06×11.53 mm
13ct
23.68×11.84 mm
23.68×11.84 mm
14ct
24.28×12.14 mm
24.28×12.14 mm
15ct
24.84×12.42 mm
24.84×12.42 mm
16ct
25.38×12.69 mm
25.38×12.69 mm
17ct
25.9×12.95 mm
25.9×12.95 mm
18ct
26.4×13.2 mm
26.4×13.2 mm
19ct
26.88×13.44 mm
26.88×13.44 mm
20ct
27.34×13.67 mm
27.34×13.67 mm
22ct
28.22×14.11 mm
28.22×14.11 mm
24ct
29.04×14.52 mm
29.04×14.52 mm
26ct
29.84×14.92 mm
29.84×14.92 mm
28ct
30.58×15.29 mm
30.58×15.29 mm
30ct
31.3×15.65 mm
31.3×15.65 mm
33ct
32.3×16.15 mm
32.3×16.15 mm
36ct
33.26×16.63 mm
33.26×16.63 mm
40ct
34.44×17.22 mm
34.44×17.22 mm
Length-to-width ratio: 2, 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 marquise-cut Spinel carat weights to their approximate millimeter (mm) sizes:
| Carat Weight | MM Size |
|---|---|
| 0.25 ct | 6.34×3.17 mm |
| 0.5 ct | 8×4 mm |
| 0.75 ct | 9.14×4.57 mm |
| 1 ct | 10.08×5.04 mm |
| 1.25 ct | 10.84×5.42 mm |
| 1.5 ct | 11.52×5.76 mm |
| 1.75 ct | 12.14×6.07 mm |
| 2 ct | 12.68×6.34 mm |
| 2.5 ct | 13.66×6.83 mm |
| 3 ct | 14.52×7.26 mm |
| 3.5 ct | 15.28×7.64 mm |
| 4 ct | 15.98×7.99 mm |
| 4.5 ct | 16.62×8.31 mm |
| 5 ct | 17.22×8.61 mm |
| 5.5 ct | 17.78×8.89 mm |
| 6 ct | 18.3×9.15 mm |
| 6.5 ct | 18.8×9.4 mm |
| 7 ct | 19.26×9.63 mm |
| 7.5 ct | 19.72×9.86 mm |
| 8 ct | 20.14×10.07 mm |
| 8.5 ct | 20.56×10.28 mm |
| Carat Weight | MM Size |
|---|---|
| 9 ct | 20.94×10.47 mm |
| 9.5 ct | 21.32×10.66 mm |
| 10 ct | 21.7×10.85 mm |
| 11 ct | 22.4×11.2 mm |
| 12 ct | 23.06×11.53 mm |
| 13 ct | 23.68×11.84 mm |
| 14 ct | 24.28×12.14 mm |
| 15 ct | 24.84×12.42 mm |
| 16 ct | 25.38×12.69 mm |
| 17 ct | 25.9×12.95 mm |
| 18 ct | 26.4×13.2 mm |
| 19 ct | 26.88×13.44 mm |
| 20 ct | 27.34×13.67 mm |
| 22 ct | 28.22×14.11 mm |
| 24 ct | 29.04×14.52 mm |
| 26 ct | 29.84×14.92 mm |
| 28 ct | 30.58×15.29 mm |
| 30 ct | 31.3×15.65 mm |
| 33 ct | 32.3×16.15 mm |
| 36 ct | 33.26×16.63 mm |
| 40 ct | 34.44×17.22 mm |