Lab Grown Diamond Size Guide
Approximate size ranges are listed. Most diamonds will fall somewhere in the middle of the size ranges listed. For fancy shapes (anything other than round), we aim to maintain ideal ratio measurements as much as possible.
Round Brilliant Cut
DEF Colour
VVS1-VS1 Clarity
Ideal/Excellent cut, polish, & symmetry
| Carat | Diameter (approximate) |
| 0.50 ct | 5mm |
| 0.80 ct | 6mm |
| 1.00 ct | [6.3-6.6]mm |
| 1.50 ct | [7.3-7.9]mm |
| 2.00 ct | [8.0-8.3]mm |
| 2.50 ct | [8.6-8.8]mm |
Emerald Cut
DEF Colour
VVS1-VS1 Clarity
Excellent/Very Good polish & symmetry
| Carat |
Dimensions (approximate) Length x Width |
| 0.50 ct | [5.2-5.7] x [3.6-3.9]mm |
| 0.80 ct | [6.2-6.5] x [4.3-4.6]mm |
| 1.00 ct | [6.6-7.2] x [4.5-4.9]mm |
| 1.50 ct | [7.3-8.2] x [5.3-6.3]mm |
| 2.00 ct | [8.4-8.9] x [5.8-6.4]mm |
| 2.50 ct | [9.1-10.0] x [5.8-6.5]mm |
Oval Cut
DEF Colour
VVS1-VS1 Clarity
Excellent/Very Good polish & symmetry
| Carat |
Dimensions (approximate) Length x Width |
| 0.50 ct | [6.6-7.0] x [4.4-4.7]mm |
| 0.80 ct | [7.3-7.6] x [5.2-5.4]mm |
| 1.00 ct | [8.1-8.6] x [5.5-5.8]mm |
| 1.50 ct | [9.0-9.8] x [6.3-6.6]mm |
| 2.00 ct | [9.9-10.5] x [7.0-7.3]mm |
| 2.50 ct | [10.7-11.3] x [7.5-7.8]mm |
Marquise Cut
DEF Colour (except for 1.5ct, which will be G colour due to availability)
VVS1-VS1 Clarity
Excellent/Very Good polish & symmetry
| Carat |
Dimensions (approximate) Length x Width |
| 0.50 ct | [7.9-9.0] x [4.0-4.6]mm |
| 0.80 ct | [9.2-10.0] x [4.7-5.0]mm |
| 1.00 ct | [10.0-11.0] x [5.2-5.5]mm |
| 1.50 ct | [11.3-12.4] x [5.6-6.2]mm |
| 2.00 ct | [12.3-13.6] x [6.5-6.8]mm |
| 2.50 ct | Currently Unavailable |
Pear Cut
DEF Colour
VVS1-VS1 Clarity
Excellent/Very Good polish & symmetry
| Carat |
Dimensions (approximate) Length x Width |
| 0.50 ct | [7.3-7.7] x [4.4-4.7]mm |
| 0.80 ct | [8.2-8.8] x [5.1-5.4]mm |
| 1.00 ct | [8.9-9.3] x [5.5-5.8]mm |
| 1.50 ct | [10.0-10.6] x [6.3-6.5]mm |
| 2.00 ct | [11.0-11.7] x [6.9-7.2]mm |
| 2.50 ct | Currently Unavailable |
Cushion Cut
DEF Colour
VVS1-VS1 Clarity
Excellent/Very Good polish & symmetry
| Carat |
Dimensions (approximate) Length x Width |
| 0.50 ct | Currently Unavailable |
| 0.80 ct | [5.4-6.2] x [5.0-5.5]mm |
| 1.00 ct | [5.9-7.1] x [5.1-5.6]mm |
| 1.50 ct | [7.0-7.9] x [6.0-6.4]mm |
| 2.00 ct | [7.1-8.0] x [6.8-7.1]mm |
| 2.50 ct | Currently Unavailable |