Oval-cut Alexandrite Size Chart
Carat to mm size chart for oval-cut Alexandrite, 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:
Alexandrite Size Chart (Oval Cut)
0.25ct
4.95×3.3 mm
4.95×3.3 mm
0.5ct
6.23×4.15 mm
6.23×4.15 mm
0.75ct
7.13×4.75 mm
7.13×4.75 mm
1ct
7.85×5.23 mm
7.85×5.23 mm
1.25ct
8.46×5.64 mm
8.46×5.64 mm
1.5ct
8.99×5.99 mm
8.99×5.99 mm
1.75ct
9.45×6.3 mm
9.45×6.3 mm
2ct
9.89×6.59 mm
9.89×6.59 mm
2.5ct
10.65×7.1 mm
10.65×7.1 mm
3ct
11.33×7.55 mm
11.33×7.55 mm
3.5ct
11.91×7.94 mm
11.91×7.94 mm
4ct
12.47×8.31 mm
12.47×8.31 mm
4.5ct
12.96×8.64 mm
12.96×8.64 mm
5ct
13.43×8.95 mm
13.43×8.95 mm
5.5ct
13.86×9.24 mm
13.86×9.24 mm
6ct
14.27×9.51 mm
14.27×9.51 mm
6.5ct
14.64×9.76 mm
14.64×9.76 mm
7ct
15.02×10.01 mm
15.02×10.01 mm
7.5ct
15.36×10.24 mm
15.36×10.24 mm
8ct
15.69×10.46 mm
15.69×10.46 mm
8.5ct
16.02×10.68 mm
16.02×10.68 mm
9ct
16.32×10.88 mm
16.32×10.88 mm
9.5ct
16.62×11.08 mm
16.62×11.08 mm
10ct
16.91×11.27 mm
16.91×11.27 mm
11ct
17.46×11.64 mm
17.46×11.64 mm
12ct
17.97×11.98 mm
17.97×11.98 mm
13ct
18.45×12.3 mm
18.45×12.3 mm
14ct
18.92×12.61 mm
18.92×12.61 mm
15ct
19.35×12.9 mm
19.35×12.9 mm
16ct
19.77×13.18 mm
19.77×13.18 mm
17ct
20.18×13.45 mm
20.18×13.45 mm
18ct
20.57×13.71 mm
20.57×13.71 mm
19ct
20.94×13.96 mm
20.94×13.96 mm
20ct
21.3×14.2 mm
21.3×14.2 mm
22ct
21.99×14.66 mm
21.99×14.66 mm
24ct
22.64×15.09 mm
22.64×15.09 mm
26ct
23.25×15.5 mm
23.25×15.5 mm
28ct
23.84×15.89 mm
23.84×15.89 mm
30ct
24.39×16.26 mm
24.39×16.26 mm
33ct
25.17×16.78 mm
25.17×16.78 mm
36ct
25.92×17.28 mm
25.92×17.28 mm
40ct
26.84×17.89 mm
26.84×17.89 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 Alexandrite carat weights to their approximate millimeter (mm) sizes:
| Carat Weight | MM Size |
|---|---|
| 0.25 ct | 4.95×3.3 mm |
| 0.5 ct | 6.23×4.15 mm |
| 0.75 ct | 7.13×4.75 mm |
| 1 ct | 7.85×5.23 mm |
| 1.25 ct | 8.46×5.64 mm |
| 1.5 ct | 8.99×5.99 mm |
| 1.75 ct | 9.45×6.3 mm |
| 2 ct | 9.89×6.59 mm |
| 2.5 ct | 10.65×7.1 mm |
| 3 ct | 11.33×7.55 mm |
| 3.5 ct | 11.91×7.94 mm |
| 4 ct | 12.47×8.31 mm |
| 4.5 ct | 12.96×8.64 mm |
| 5 ct | 13.43×8.95 mm |
| 5.5 ct | 13.86×9.24 mm |
| 6 ct | 14.27×9.51 mm |
| 6.5 ct | 14.64×9.76 mm |
| 7 ct | 15.02×10.01 mm |
| 7.5 ct | 15.36×10.24 mm |
| 8 ct | 15.69×10.46 mm |
| 8.5 ct | 16.02×10.68 mm |
| Carat Weight | MM Size |
|---|---|
| 9 ct | 16.32×10.88 mm |
| 9.5 ct | 16.62×11.08 mm |
| 10 ct | 16.91×11.27 mm |
| 11 ct | 17.46×11.64 mm |
| 12 ct | 17.97×11.98 mm |
| 13 ct | 18.45×12.3 mm |
| 14 ct | 18.92×12.61 mm |
| 15 ct | 19.35×12.9 mm |
| 16 ct | 19.77×13.18 mm |
| 17 ct | 20.18×13.45 mm |
| 18 ct | 20.57×13.71 mm |
| 19 ct | 20.94×13.96 mm |
| 20 ct | 21.3×14.2 mm |
| 22 ct | 21.99×14.66 mm |
| 24 ct | 22.64×15.09 mm |
| 26 ct | 23.25×15.5 mm |
| 28 ct | 23.84×15.89 mm |
| 30 ct | 24.39×16.26 mm |
| 33 ct | 25.17×16.78 mm |
| 36 ct | 25.92×17.28 mm |
| 40 ct | 26.84×17.89 mm |