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Round Diamond Sizes & Weights

Carat WeightMillimeter Size
.005 pt

1.0mm

.0075 pt

1.2mm

.008 pt

1.25mm

.0095 pt

1.3mm

.01 pt

1.35mm

.0125 pt

1.45mm

.0153 pt

1.55mm

.02 pt

1.7mm

.025 pt

1.8mm

.03 pt

1.9mm

.035 pt

2.0mm

.04 pt

2.1mm

.045 pt

2.2mm

.05 pt

2.3mm

.055 pt

2.4mm

.06 pt

2.45mm

.065 pt

2.5mm

.07 pt

2.6mm

.075 pt

2.65mm

.08 pt

2.7mm

.09 pt

2.85mm

.095 pt

2.9mm

.115 pt

3.1mm

.12 pt

3.15mm
Carat WeightMillimeter Size
.125 pt

3.2mm

.13 pt

3.25mm

.14 pt

3.3mm

.15 pt

3.4mm

.16 pt

3.5mm

.17 pt

3.55mm

.18 pt

3.65mm

.19 pt

3.7mm

.20 pt

3.8mm

.25 pt

4.0mm

.30 pt

4.3mm

.35 pt

4.45mm

.40 pt

4.75mm

.50 pt

5.0mm

.75 pt

5.9mm

1.0 ct

6.5mm

1.5 ct

7.4mm

2.0 ct

8.2mm

2.5 ct

8.8mm

3.0 ct

9.3mm

3.5 ct

9.85mm

4.0 ct

10.3mm

5.0 ct

11.09mm

6.0 ct

11.8mm