Marquise-cut Quartz Size Chart
Carat to mm size chart for marquise-cut Quartz, 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:
Quartz Size Chart (Marquise Cut)
0.25ct
7.02×3.51 mm
7.02×3.51 mm
0.5ct
8.86×4.43 mm
8.86×4.43 mm
0.75ct
10.14×5.07 mm
10.14×5.07 mm
1ct
11.16×5.58 mm
11.16×5.58 mm
1.25ct
12.02×6.01 mm
12.02×6.01 mm
1.5ct
12.76×6.38 mm
12.76×6.38 mm
1.75ct
13.44×6.72 mm
13.44×6.72 mm
2ct
14.06×7.03 mm
14.06×7.03 mm
2.5ct
15.14×7.57 mm
15.14×7.57 mm
3ct
16.08×8.04 mm
16.08×8.04 mm
3.5ct
16.94×8.47 mm
16.94×8.47 mm
4ct
17.7×8.85 mm
17.7×8.85 mm
4.5ct
18.42×9.21 mm
18.42×9.21 mm
5ct
19.08×9.54 mm
19.08×9.54 mm
5.5ct
19.68×9.84 mm
19.68×9.84 mm
6ct
20.26×10.13 mm
20.26×10.13 mm
6.5ct
20.82×10.41 mm
20.82×10.41 mm
7ct
21.34×10.67 mm
21.34×10.67 mm
7.5ct
21.84×10.92 mm
21.84×10.92 mm
8ct
22.3×11.15 mm
22.3×11.15 mm
8.5ct
22.76×11.38 mm
22.76×11.38 mm
9ct
23.2×11.6 mm
23.2×11.6 mm
9.5ct
23.62×11.81 mm
23.62×11.81 mm
10ct
24.02×12.01 mm
24.02×12.01 mm
11ct
24.8×12.4 mm
24.8×12.4 mm
12ct
25.54×12.77 mm
25.54×12.77 mm
13ct
26.22×13.11 mm
26.22×13.11 mm
14ct
26.88×13.44 mm
26.88×13.44 mm
15ct
27.5×13.75 mm
27.5×13.75 mm
16ct
28.1×14.05 mm
28.1×14.05 mm
17ct
28.68×14.34 mm
28.68×14.34 mm
18ct
29.22×14.61 mm
29.22×14.61 mm
19ct
29.76×14.88 mm
29.76×14.88 mm
20ct
30.28×15.14 mm
30.28×15.14 mm
22ct
31.26×15.63 mm
31.26×15.63 mm
24ct
32.18×16.09 mm
32.18×16.09 mm
26ct
33.04×16.52 mm
33.04×16.52 mm
28ct
33.86×16.93 mm
33.86×16.93 mm
30ct
34.66×17.33 mm
34.66×17.33 mm
33ct
35.78×17.89 mm
35.78×17.89 mm
36ct
36.82×18.41 mm
36.82×18.41 mm
40ct
38.14×19.07 mm
38.14×19.07 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 Quartz carat weights to their approximate millimeter (mm) sizes:
| Carat Weight | MM Size |
|---|---|
| 0.25 ct | 7.02×3.51 mm |
| 0.5 ct | 8.86×4.43 mm |
| 0.75 ct | 10.14×5.07 mm |
| 1 ct | 11.16×5.58 mm |
| 1.25 ct | 12.02×6.01 mm |
| 1.5 ct | 12.76×6.38 mm |
| 1.75 ct | 13.44×6.72 mm |
| 2 ct | 14.06×7.03 mm |
| 2.5 ct | 15.14×7.57 mm |
| 3 ct | 16.08×8.04 mm |
| 3.5 ct | 16.94×8.47 mm |
| 4 ct | 17.7×8.85 mm |
| 4.5 ct | 18.42×9.21 mm |
| 5 ct | 19.08×9.54 mm |
| 5.5 ct | 19.68×9.84 mm |
| 6 ct | 20.26×10.13 mm |
| 6.5 ct | 20.82×10.41 mm |
| 7 ct | 21.34×10.67 mm |
| 7.5 ct | 21.84×10.92 mm |
| 8 ct | 22.3×11.15 mm |
| 8.5 ct | 22.76×11.38 mm |
| Carat Weight | MM Size |
|---|---|
| 9 ct | 23.2×11.6 mm |
| 9.5 ct | 23.62×11.81 mm |
| 10 ct | 24.02×12.01 mm |
| 11 ct | 24.8×12.4 mm |
| 12 ct | 25.54×12.77 mm |
| 13 ct | 26.22×13.11 mm |
| 14 ct | 26.88×13.44 mm |
| 15 ct | 27.5×13.75 mm |
| 16 ct | 28.1×14.05 mm |
| 17 ct | 28.68×14.34 mm |
| 18 ct | 29.22×14.61 mm |
| 19 ct | 29.76×14.88 mm |
| 20 ct | 30.28×15.14 mm |
| 22 ct | 31.26×15.63 mm |
| 24 ct | 32.18×16.09 mm |
| 26 ct | 33.04×16.52 mm |
| 28 ct | 33.86×16.93 mm |
| 30 ct | 34.66×17.33 mm |
| 33 ct | 35.78×17.89 mm |
| 36 ct | 36.82×18.41 mm |
| 40 ct | 38.14×19.07 mm |