Marquise-cut Apatite Size Chart
Carat to mm size chart for marquise-cut Apatite, 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:
Apatite Size Chart (Marquise Cut)
0.25ct
6.6×3.3 mm
6.6×3.3 mm
0.5ct
8.32×4.16 mm
8.32×4.16 mm
0.75ct
9.52×4.76 mm
9.52×4.76 mm
1ct
10.48×5.24 mm
10.48×5.24 mm
1.25ct
11.28×5.64 mm
11.28×5.64 mm
1.5ct
11.98×5.99 mm
11.98×5.99 mm
1.75ct
12.62×6.31 mm
12.62×6.31 mm
2ct
13.2×6.6 mm
13.2×6.6 mm
2.5ct
14.22×7.11 mm
14.22×7.11 mm
3ct
15.1×7.55 mm
15.1×7.55 mm
3.5ct
15.9×7.95 mm
15.9×7.95 mm
4ct
16.62×8.31 mm
16.62×8.31 mm
4.5ct
17.3×8.65 mm
17.3×8.65 mm
5ct
17.9×8.95 mm
17.9×8.95 mm
5.5ct
18.48×9.24 mm
18.48×9.24 mm
6ct
19.04×9.52 mm
19.04×9.52 mm
6.5ct
19.54×9.77 mm
19.54×9.77 mm
7ct
20.04×10.02 mm
20.04×10.02 mm
7.5ct
20.5×10.25 mm
20.5×10.25 mm
8ct
20.94×10.47 mm
20.94×10.47 mm
8.5ct
21.38×10.69 mm
21.38×10.69 mm
9ct
21.78×10.89 mm
21.78×10.89 mm
9.5ct
22.18×11.09 mm
22.18×11.09 mm
10ct
22.56×11.28 mm
22.56×11.28 mm
11ct
23.3×11.65 mm
23.3×11.65 mm
12ct
23.98×11.99 mm
23.98×11.99 mm
13ct
24.62×12.31 mm
24.62×12.31 mm
14ct
25.24×12.62 mm
25.24×12.62 mm
15ct
25.82×12.91 mm
25.82×12.91 mm
16ct
26.4×13.2 mm
26.4×13.2 mm
17ct
26.94×13.47 mm
26.94×13.47 mm
18ct
27.44×13.72 mm
27.44×13.72 mm
19ct
27.94×13.97 mm
27.94×13.97 mm
20ct
28.42×14.21 mm
28.42×14.21 mm
22ct
29.34×14.67 mm
29.34×14.67 mm
24ct
30.22×15.11 mm
30.22×15.11 mm
26ct
31.02×15.51 mm
31.02×15.51 mm
28ct
31.8×15.9 mm
31.8×15.9 mm
30ct
32.54×16.27 mm
32.54×16.27 mm
33ct
33.6×16.8 mm
33.6×16.8 mm
36ct
34.58×17.29 mm
34.58×17.29 mm
40ct
35.82×17.91 mm
35.82×17.91 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 Apatite carat weights to their approximate millimeter (mm) sizes:
| Carat Weight | MM Size |
|---|---|
| 0.25 ct | 6.6×3.3 mm |
| 0.5 ct | 8.32×4.16 mm |
| 0.75 ct | 9.52×4.76 mm |
| 1 ct | 10.48×5.24 mm |
| 1.25 ct | 11.28×5.64 mm |
| 1.5 ct | 11.98×5.99 mm |
| 1.75 ct | 12.62×6.31 mm |
| 2 ct | 13.2×6.6 mm |
| 2.5 ct | 14.22×7.11 mm |
| 3 ct | 15.1×7.55 mm |
| 3.5 ct | 15.9×7.95 mm |
| 4 ct | 16.62×8.31 mm |
| 4.5 ct | 17.3×8.65 mm |
| 5 ct | 17.9×8.95 mm |
| 5.5 ct | 18.48×9.24 mm |
| 6 ct | 19.04×9.52 mm |
| 6.5 ct | 19.54×9.77 mm |
| 7 ct | 20.04×10.02 mm |
| 7.5 ct | 20.5×10.25 mm |
| 8 ct | 20.94×10.47 mm |
| 8.5 ct | 21.38×10.69 mm |
| Carat Weight | MM Size |
|---|---|
| 9 ct | 21.78×10.89 mm |
| 9.5 ct | 22.18×11.09 mm |
| 10 ct | 22.56×11.28 mm |
| 11 ct | 23.3×11.65 mm |
| 12 ct | 23.98×11.99 mm |
| 13 ct | 24.62×12.31 mm |
| 14 ct | 25.24×12.62 mm |
| 15 ct | 25.82×12.91 mm |
| 16 ct | 26.4×13.2 mm |
| 17 ct | 26.94×13.47 mm |
| 18 ct | 27.44×13.72 mm |
| 19 ct | 27.94×13.97 mm |
| 20 ct | 28.42×14.21 mm |
| 22 ct | 29.34×14.67 mm |
| 24 ct | 30.22×15.11 mm |
| 26 ct | 31.02×15.51 mm |
| 28 ct | 31.8×15.9 mm |
| 30 ct | 32.54×16.27 mm |
| 33 ct | 33.6×16.8 mm |
| 36 ct | 34.58×17.29 mm |
| 40 ct | 35.82×17.91 mm |