Marquise-cut Sapphire Size Chart
Carat to mm size chart for marquise-cut Sapphire, 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:
Sapphire Size Chart (Marquise Cut)
0.25ct
6.12×3.06 mm
6.12×3.06 mm
0.5ct
7.72×3.86 mm
7.72×3.86 mm
0.75ct
8.84×4.42 mm
8.84×4.42 mm
1ct
9.72×4.86 mm
9.72×4.86 mm
1.25ct
10.48×5.24 mm
10.48×5.24 mm
1.5ct
11.12×5.56 mm
11.12×5.56 mm
1.75ct
11.72×5.86 mm
11.72×5.86 mm
2ct
12.24×6.12 mm
12.24×6.12 mm
2.5ct
13.2×6.6 mm
13.2×6.6 mm
3ct
14.02×7.01 mm
14.02×7.01 mm
3.5ct
14.76×7.38 mm
14.76×7.38 mm
4ct
15.44×7.72 mm
15.44×7.72 mm
4.5ct
16.06×8.03 mm
16.06×8.03 mm
5ct
16.62×8.31 mm
16.62×8.31 mm
5.5ct
17.16×8.58 mm
17.16×8.58 mm
6ct
17.66×8.83 mm
17.66×8.83 mm
6.5ct
18.14×9.07 mm
18.14×9.07 mm
7ct
18.6×9.3 mm
18.6×9.3 mm
7.5ct
19.04×9.52 mm
19.04×9.52 mm
8ct
19.44×9.72 mm
19.44×9.72 mm
8.5ct
19.84×9.92 mm
19.84×9.92 mm
9ct
20.22×10.11 mm
20.22×10.11 mm
9.5ct
20.6×10.3 mm
20.6×10.3 mm
10ct
20.94×10.47 mm
20.94×10.47 mm
11ct
21.62×10.81 mm
21.62×10.81 mm
12ct
22.26×11.13 mm
22.26×11.13 mm
13ct
22.86×11.43 mm
22.86×11.43 mm
14ct
23.44×11.72 mm
23.44×11.72 mm
15ct
23.98×11.99 mm
23.98×11.99 mm
16ct
24.5×12.25 mm
24.5×12.25 mm
17ct
25×12.5 mm
25×12.5 mm
18ct
25.48×12.74 mm
25.48×12.74 mm
19ct
25.94×12.97 mm
25.94×12.97 mm
20ct
26.4×13.2 mm
26.4×13.2 mm
22ct
27.24×13.62 mm
27.24×13.62 mm
24ct
28.04×14.02 mm
28.04×14.02 mm
26ct
28.8×14.4 mm
28.8×14.4 mm
28ct
29.52×14.76 mm
29.52×14.76 mm
30ct
30.22×15.11 mm
30.22×15.11 mm
33ct
31.18×15.59 mm
31.18×15.59 mm
36ct
32.1×16.05 mm
32.1×16.05 mm
40ct
33.26×16.63 mm
33.26×16.63 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 Sapphire carat weights to their approximate millimeter (mm) sizes:
| Carat Weight | MM Size |
|---|---|
| 0.25 ct | 6.12×3.06 mm |
| 0.5 ct | 7.72×3.86 mm |
| 0.75 ct | 8.84×4.42 mm |
| 1 ct | 9.72×4.86 mm |
| 1.25 ct | 10.48×5.24 mm |
| 1.5 ct | 11.12×5.56 mm |
| 1.75 ct | 11.72×5.86 mm |
| 2 ct | 12.24×6.12 mm |
| 2.5 ct | 13.2×6.6 mm |
| 3 ct | 14.02×7.01 mm |
| 3.5 ct | 14.76×7.38 mm |
| 4 ct | 15.44×7.72 mm |
| 4.5 ct | 16.06×8.03 mm |
| 5 ct | 16.62×8.31 mm |
| 5.5 ct | 17.16×8.58 mm |
| 6 ct | 17.66×8.83 mm |
| 6.5 ct | 18.14×9.07 mm |
| 7 ct | 18.6×9.3 mm |
| 7.5 ct | 19.04×9.52 mm |
| 8 ct | 19.44×9.72 mm |
| 8.5 ct | 19.84×9.92 mm |
| Carat Weight | MM Size |
|---|---|
| 9 ct | 20.22×10.11 mm |
| 9.5 ct | 20.6×10.3 mm |
| 10 ct | 20.94×10.47 mm |
| 11 ct | 21.62×10.81 mm |
| 12 ct | 22.26×11.13 mm |
| 13 ct | 22.86×11.43 mm |
| 14 ct | 23.44×11.72 mm |
| 15 ct | 23.98×11.99 mm |
| 16 ct | 24.5×12.25 mm |
| 17 ct | 25×12.5 mm |
| 18 ct | 25.48×12.74 mm |
| 19 ct | 25.94×12.97 mm |
| 20 ct | 26.4×13.2 mm |
| 22 ct | 27.24×13.62 mm |
| 24 ct | 28.04×14.02 mm |
| 26 ct | 28.8×14.4 mm |
| 28 ct | 29.52×14.76 mm |
| 30 ct | 30.22×15.11 mm |
| 33 ct | 31.18×15.59 mm |
| 36 ct | 32.1×16.05 mm |
| 40 ct | 33.26×16.63 mm |