Oval-cut Topaz Size Chart
Carat to mm size chart for oval-cut Topaz, 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:
Topaz Size Chart (Oval Cut)
0.25ct
5.04×3.36 mm
5.04×3.36 mm
0.5ct
6.35×4.23 mm
6.35×4.23 mm
0.75ct
7.26×4.84 mm
7.26×4.84 mm
1ct
8×5.33 mm
8×5.33 mm
1.25ct
8.61×5.74 mm
8.61×5.74 mm
1.5ct
9.15×6.1 mm
9.15×6.1 mm
1.75ct
9.63×6.42 mm
9.63×6.42 mm
2ct
10.07×6.71 mm
10.07×6.71 mm
2.5ct
10.85×7.23 mm
10.85×7.23 mm
3ct
11.54×7.69 mm
11.54×7.69 mm
3.5ct
12.14×8.09 mm
12.14×8.09 mm
4ct
12.69×8.46 mm
12.69×8.46 mm
4.5ct
13.2×8.8 mm
13.2×8.8 mm
5ct
13.67×9.11 mm
13.67×9.11 mm
5.5ct
14.12×9.41 mm
14.12×9.41 mm
6ct
14.52×9.68 mm
14.52×9.68 mm
6.5ct
14.93×9.95 mm
14.93×9.95 mm
7ct
15.29×10.19 mm
15.29×10.19 mm
7.5ct
15.65×10.43 mm
15.65×10.43 mm
8ct
15.99×10.66 mm
15.99×10.66 mm
8.5ct
16.32×10.88 mm
16.32×10.88 mm
9ct
16.62×11.08 mm
16.62×11.08 mm
9.5ct
16.94×11.29 mm
16.94×11.29 mm
10ct
17.22×11.48 mm
17.22×11.48 mm
11ct
17.78×11.85 mm
17.78×11.85 mm
12ct
18.3×12.2 mm
18.3×12.2 mm
13ct
18.8×12.53 mm
18.8×12.53 mm
14ct
19.26×12.84 mm
19.26×12.84 mm
15ct
19.71×13.14 mm
19.71×13.14 mm
16ct
20.15×13.43 mm
20.15×13.43 mm
17ct
20.55×13.7 mm
20.55×13.7 mm
18ct
20.96×13.97 mm
20.96×13.97 mm
19ct
21.33×14.22 mm
21.33×14.22 mm
20ct
21.69×14.46 mm
21.69×14.46 mm
22ct
22.4×14.93 mm
22.4×14.93 mm
24ct
23.06×15.37 mm
23.06×15.37 mm
26ct
23.69×15.79 mm
23.69×15.79 mm
28ct
24.27×16.18 mm
24.27×16.18 mm
30ct
24.84×16.56 mm
24.84×16.56 mm
33ct
25.64×17.09 mm
25.64×17.09 mm
36ct
26.4×17.6 mm
26.4×17.6 mm
40ct
27.33×18.22 mm
27.33×18.22 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 Topaz carat weights to their approximate millimeter (mm) sizes:
| Carat Weight | MM Size |
|---|---|
| 0.25 ct | 5.04×3.36 mm |
| 0.5 ct | 6.35×4.23 mm |
| 0.75 ct | 7.26×4.84 mm |
| 1 ct | 8×5.33 mm |
| 1.25 ct | 8.61×5.74 mm |
| 1.5 ct | 9.15×6.1 mm |
| 1.75 ct | 9.63×6.42 mm |
| 2 ct | 10.07×6.71 mm |
| 2.5 ct | 10.85×7.23 mm |
| 3 ct | 11.54×7.69 mm |
| 3.5 ct | 12.14×8.09 mm |
| 4 ct | 12.69×8.46 mm |
| 4.5 ct | 13.2×8.8 mm |
| 5 ct | 13.67×9.11 mm |
| 5.5 ct | 14.12×9.41 mm |
| 6 ct | 14.52×9.68 mm |
| 6.5 ct | 14.93×9.95 mm |
| 7 ct | 15.29×10.19 mm |
| 7.5 ct | 15.65×10.43 mm |
| 8 ct | 15.99×10.66 mm |
| 8.5 ct | 16.32×10.88 mm |
| Carat Weight | MM Size |
|---|---|
| 9 ct | 16.62×11.08 mm |
| 9.5 ct | 16.94×11.29 mm |
| 10 ct | 17.22×11.48 mm |
| 11 ct | 17.78×11.85 mm |
| 12 ct | 18.3×12.2 mm |
| 13 ct | 18.8×12.53 mm |
| 14 ct | 19.26×12.84 mm |
| 15 ct | 19.71×13.14 mm |
| 16 ct | 20.15×13.43 mm |
| 17 ct | 20.55×13.7 mm |
| 18 ct | 20.96×13.97 mm |
| 19 ct | 21.33×14.22 mm |
| 20 ct | 21.69×14.46 mm |
| 22 ct | 22.4×14.93 mm |
| 24 ct | 23.06×15.37 mm |
| 26 ct | 23.69×15.79 mm |
| 28 ct | 24.27×16.18 mm |
| 30 ct | 24.84×16.56 mm |
| 33 ct | 25.64×17.09 mm |
| 36 ct | 26.4×17.6 mm |
| 40 ct | 27.33×18.22 mm |