Baguette-cut Ruby Size Chart
Carat to mm size chart for baguette-cut Ruby, 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:
Ruby Size Chart (Baguette Cut)
0.25ct
4.37×2.91 mm
4.37×2.91 mm
0.5ct
5.51×3.67 mm
5.51×3.67 mm
0.75ct
6.3×4.2 mm
6.3×4.2 mm
1ct
6.93×4.62 mm
6.93×4.62 mm
1.25ct
7.47×4.98 mm
7.47×4.98 mm
1.5ct
7.94×5.29 mm
7.94×5.29 mm
1.75ct
8.36×5.57 mm
8.36×5.57 mm
2ct
8.73×5.82 mm
8.73×5.82 mm
2.5ct
9.41×6.27 mm
9.41×6.27 mm
3ct
9.99×6.66 mm
9.99×6.66 mm
3.5ct
10.52×7.01 mm
10.52×7.01 mm
4ct
11×7.33 mm
11×7.33 mm
4.5ct
11.45×7.63 mm
11.45×7.63 mm
5ct
11.85×7.9 mm
11.85×7.9 mm
5.5ct
12.24×8.16 mm
12.24×8.16 mm
6ct
12.6×8.4 mm
12.6×8.4 mm
6.5ct
12.93×8.62 mm
12.93×8.62 mm
7ct
13.26×8.84 mm
13.26×8.84 mm
7.5ct
13.56×9.04 mm
13.56×9.04 mm
8ct
13.86×9.24 mm
13.86×9.24 mm
8.5ct
14.15×9.43 mm
14.15×9.43 mm
9ct
14.42×9.61 mm
14.42×9.61 mm
9.5ct
14.69×9.79 mm
14.69×9.79 mm
10ct
14.93×9.95 mm
14.93×9.95 mm
11ct
15.42×10.28 mm
15.42×10.28 mm
12ct
15.87×10.58 mm
15.87×10.58 mm
13ct
16.29×10.86 mm
16.29×10.86 mm
14ct
16.71×11.14 mm
16.71×11.14 mm
15ct
17.09×11.39 mm
17.09×11.39 mm
16ct
17.46×11.64 mm
17.46×11.64 mm
17ct
17.82×11.88 mm
17.82×11.88 mm
18ct
18.17×12.11 mm
18.17×12.11 mm
19ct
18.5×12.33 mm
18.5×12.33 mm
20ct
18.81×12.54 mm
18.81×12.54 mm
22ct
19.43×12.95 mm
19.43×12.95 mm
24ct
20×13.33 mm
20×13.33 mm
26ct
20.54×13.69 mm
20.54×13.69 mm
28ct
21.05×14.03 mm
21.05×14.03 mm
30ct
21.54×14.36 mm
21.54×14.36 mm
33ct
22.23×14.82 mm
22.23×14.82 mm
36ct
22.89×15.26 mm
22.89×15.26 mm
40ct
23.7×15.8 mm
23.7×15.8 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 baguette-cut Ruby carat weights to their approximate millimeter (mm) sizes:
| Carat Weight | MM Size |
|---|---|
| 0.25 ct | 4.37×2.91 mm |
| 0.5 ct | 5.51×3.67 mm |
| 0.75 ct | 6.3×4.2 mm |
| 1 ct | 6.93×4.62 mm |
| 1.25 ct | 7.47×4.98 mm |
| 1.5 ct | 7.94×5.29 mm |
| 1.75 ct | 8.36×5.57 mm |
| 2 ct | 8.73×5.82 mm |
| 2.5 ct | 9.41×6.27 mm |
| 3 ct | 9.99×6.66 mm |
| 3.5 ct | 10.52×7.01 mm |
| 4 ct | 11×7.33 mm |
| 4.5 ct | 11.45×7.63 mm |
| 5 ct | 11.85×7.9 mm |
| 5.5 ct | 12.24×8.16 mm |
| 6 ct | 12.6×8.4 mm |
| 6.5 ct | 12.93×8.62 mm |
| 7 ct | 13.26×8.84 mm |
| 7.5 ct | 13.56×9.04 mm |
| 8 ct | 13.86×9.24 mm |
| 8.5 ct | 14.15×9.43 mm |
| Carat Weight | MM Size |
|---|---|
| 9 ct | 14.42×9.61 mm |
| 9.5 ct | 14.69×9.79 mm |
| 10 ct | 14.93×9.95 mm |
| 11 ct | 15.42×10.28 mm |
| 12 ct | 15.87×10.58 mm |
| 13 ct | 16.29×10.86 mm |
| 14 ct | 16.71×11.14 mm |
| 15 ct | 17.09×11.39 mm |
| 16 ct | 17.46×11.64 mm |
| 17 ct | 17.82×11.88 mm |
| 18 ct | 18.17×12.11 mm |
| 19 ct | 18.5×12.33 mm |
| 20 ct | 18.81×12.54 mm |
| 22 ct | 19.43×12.95 mm |
| 24 ct | 20×13.33 mm |
| 26 ct | 20.54×13.69 mm |
| 28 ct | 21.05×14.03 mm |
| 30 ct | 21.54×14.36 mm |
| 33 ct | 22.23×14.82 mm |
| 36 ct | 22.89×15.26 mm |
| 40 ct | 23.7×15.8 mm |