This tables show the diameter of round and princess(square) cut diamonds

 

Round Cut

 

BERAT
(ct)
UKURAN
(mm)
0.02 1.7
0.03 2.0
0.04 2.2
0.05 2.4
0.10 3.0
0.15 3.4
0.20 3.8
0.25 4.1
0.33 4.4
0.50 5.0
0.60 5.3
0.75 5.7
0.90 6.2
1.00 6.4
1.25 6.9
1.50 7.3
1.75 7.7
2.00 8.1
2.25 8.5
2.50 8.8
2.75 9.1
3.00 9.4
3.50 10.0
4.00 10.4
4.50 10.8
5.00 11.0
5.50 11.3
6.00 11.7
7.00 12.4

 

Princess Cut

 

BERAT
(ct)
UKURAN
(mm)
0.03 1.5
0.04 1.8
0.06 2.0
0.10 2.5
0.16 3.0
0.20 3.2
0.28 3.5
0.35 3.8
0.40 4.0
0.50 4.5
0.60 4.7
0.75 5.0
1.00 5.5
1.25 6.0
1.60 7.0
2.30 8.0