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The Truth About Diamond Carat Weight vs Size: The Industry Insider's Guide

Diamond Carat Weight vs Size: The Visual Truth You Need to Know

Think carat weight equals visual bigness? Think again. This expert jewelry guide reveals why two diamonds of the identical carat weight can look completely different on your finger. Discover how deep cuts trap hidden mass, why elongated shapes look up to 25% larger, and how to use clever setting tricks to maximize your budget. Learn the truth about diamond size vs carat to shop smarter.
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Dia (mm) Circ (mm) US & CA UK & AU Europe
14.1 44.2 3 F 44
14.3 44.8 3.25 45
14.5 45.5 3.5 G
14.7 46.1 3.75 46
14.9 46.8 4 H 47
15.1 47.4 4.25
15.3 48.0 4.5 I 48
15.5 48.7 4.75
15.7 49.3 5 J 49
15.9 50.0 5.25 50
16.1 50.6 5.5 K
16.3 51.2 5.75 51
16.5 51.9 6 L 52
16.7 52.5 6.25
16.9 53.1 6.5 M 53
17.1 53.8 6.75
17.3 54.4 7 N 54
17.5 55.1 7.25 55
17.7 55.7 7.5 O
17.9 56.3 7.75 56
18.1 57.0 8 P 57
18.3 57.6 8.25 Q
18.5 58.3 8.5
18.7 58.9 8.75 R 58
18.9 59.5 9 59
19.1 60.2 9.25 S
19.4 60.8 9.5 60
19.6 61.4 9.75 T 61
19.8 62.1 10
20.0 62.7 10.25 U 62
20.2 63.4 10.5
20.4 64.0 10.75 V 63
20.6 64.6 11 64
20.8 65.3 11.25 W
21.0 65.9 11.5 65
21.2 66.6 11.75 X 66
21.4 67.2 12
21.6 67.9 12.25 Y 67
21.8 68.5 12.5 Z
22.0 69.1 12.75 68
22.2 69.8 13 69
22.4 70.4 13.25 70
22.6 71.0 13.5
22.8 71.7 13.75
23.0 72.3 14
23.2 72.8 14.25
23.4 73.5 14.5
23.6 74.1 14.75
23.8 74.7 15