Diamond Weight to Size Comparison Chart
While diamonds that are the same shape and carat weight can have different millimeter measurements due to the differences in cut parameters, there is even a bigger differences in millimeter size between diamonds that are different shapes but the same carat weight.
Often diamond shoppers are seeking the biggest millimeter size and are not sure what shape will give them that. Other shoppers wonder what the size difference is between carat weights. The following chart provides some approximate millimeter lengths and widths for various shapes and carat weights.
Round mm Marquise mm Princess mm Pear mm Oval mm Emerald mm Heart mm Triangle mm
Carat
0.05
2.4
3.5x2
1.8x1.8
3x2
-
-
-
2.5x2.5x2.5
0.10
3.0
4.5x2.5
2.5x2.5
4x2.5
-
3x2
3x3
3x3x3
0.15
3.4
5x2.5
2.8x2.8
4.5x3
-
3.5x2.5
3.5x3.5
3.5x3.5x3.5
0.18
3.7
-
-
-
-
-
-
4x4x4
0.20
3.8
6x3
3x3
5x3.5
4.5x2.5
-
3.5x3.5
-
0.22
3.9
-
-
-
-
-
-
-
0.23
4.0
-
-
-
-
-
-
-
0.25
4.1
6.5x3.5
3.3x3.3
5.5x3.5
5x3
4.5x3.5
4x4
4.5x4.5x4.5
0.30
4.2
-
3.7x3.7
-
-
-
-
-
0.33
4.4
-
-
-
-
-
-
-
0.35
4.5
7.5x3.5
3.8x3.8
6.5x3.5
-
5x3
4.5x4.5
5x5x5
0.38
4.6
-
-
-
5x4
-
-
-
0.40
4.8
8x4
4x4
6.5x4.5
5.5x4
-
-
5.5x5.5x5.5
0.47
5.0
-
-
-
-
-
-
-
0.50
5.2
8.5x4
4.5x4.5
7x4.5
6.4
5.5x4.5
5.5
6x6x6
0.60
5.4
-
4.7x4.7
-
-
-
-
-
0.65
5.6
9x4.5
-
7.5x4.5
6.5x4.5
-
5.5x5.5
6.5x6.5x6.5
0.75
5.8
9.5x4.5
5x5
8x5
7x5
6x4
6x6
7x7x7
0.80
6.0
-
-
-
-
-
-
-
0.85
6.2
10x5
-
8.5x5
-
6.5x5
-
7.5x7.5x7.5
0.95
6.4
-
-
-
-
-
-
-
1.00
6.5
10.5x5
6x6
9x5.5
7.5x5.5
7x5
6.5x6.5
8x8x8
1.10
6.6
-
-
-
-
-
-
-
1.17
6.8
-
-
-
-
-
-
-
1.25
7.0
11x5.5
-
9.5x6
8x6
-
-
8.5x8.5x8.5
1.33
7.2
-
-
-
-
-
-
-
1.50
7.4
12x6
6.5x6.5
10x6
8.5x6.5
8x6
7x7
9x9x9
1.60
7.6
-
-
-
-
-
-
-
1.75
7.8
-
-
10.5x6.5
9x6
-
7.5x7.5
9.5x9.5x9.5
1.90
8.0
-
-
-
-
-
-
-
2.00
8.2
13x6.5
7x7
11x7
9x7
8.5x6
8x8
10x10x10
2.15
8.4
-
-
-
-
-
-
-
2.25
8.6
13.5x7
-
11.5x7
-
-
-
-
2.50
8.8
14x7
7.5x7.5
12x7.5
9x7.5
9x7
8.5x8.5
-
2.65
9.0
-
-
-
-
-
-
-
2.75
9.1
14.5x7.5
-
12.5x7.5
9.5x7.5
-
-
-
2.85
9.2
-
-
-
-
-
-
-
3.00
9.4
15x7.5
8x8
12.5x8
10x8
10x8
9x9
-
3.15
9.6
-
-
-
-
-
-
-
3.25
9.7
-
-
13x8
-
-
-
-
3.35
9.8
-
-
-
-
-
-
-
3.50
10.0
16x8
-
13.5x8.5
10x8.5
-
9.5x9.5
-
3.60
10.1
-
-
-
-
-
-
-
3.75
10.2
-
-
14x8.5
-
-
-
-
4.00
10.4
16.5x8.5
-
14x9
11x9
11x9
10x10
-
4.25
10.6
-
-
-
-
-
-
-
4.75
11.0
-
-
-
-
-
-
-
5.00
11.2
18x9
-
15x9.5
12x10
12x10
11x11
-
Please Note That These Are Approximate Measurements
Due To Variations Bulge Factors, Symmetry.
