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February 7th 2022

Princess Cut Diamond Size Chart

By Devin Jones

Princess cut diamonds can look true to size, but some diamonds of the same carat weight can vary significantly in terms of visual appearance. Our princess cut diamond size chart shows the average diameter and surface area for various princess cut diamond carat sizes.

Round Diamond Size Chart Round
Cushion Diamond Size Chart Cushion
Emerald Diamond Size Chart Emerald
Oval Diamond Size Chart Oval
Princess Diamond Size Chart Princess
Pear Diamond Size Chart Pear
Radiant Diamond Size Chart Radiant
Asscher Diamond Size Chart Asscher
Heart Diamond Size Chart Heart
Marquise Diamond Size Chart Marquise

Princess Cut Diamond Carat Size Chart

Carat Weight Side Length Surface Area (sq. mm)
0.3 ct. 3.63 13.15
0.4 ct. 4.00 15.99
0.5 ct. 4.31 18.61
0.6 ct. 4.59 21.06
0.7 ct. 4.84 23.39
0.8 ct. 5.06 25.61
0.9 ct. 5.27 27.74
1 ct. 5.46 29.80
1.1 ct. 5.64 31.80
1.2 ct. 5.81 33.73
1.3 ct. 5.97 35.62
1.4 ct. 6.12 37.46
1.5 ct. 6.27 39.26
1.6 ct. 6.40 41.02
1.7 ct. 6.54 42.74
1.8 ct. 6.67 44.44
1.9 ct. 6.79 46.10
2 ct. 6.91 47.73
2.1 ct. 7.02 49.34
2.2 ct. 7.14 50.93
2.3 ct. 7.24 52.49
2.4 ct. 7.35 54.03
2.5 ct. 7.45 55.55
2.6 ct. 7.55 57.05
2.7 ct. 7.65 58.53
2.8 ct. 7.75 60.00
2.9 ct. 7.84 61.45
3 ct. 7.93 62.88
3.1 ct. 8.02 64.29
3.2 ct. 8.11 65.70
3.3 ct. 8.19 67.09
3.4 ct. 8.27 68.46
3.5 ct. 8.36 69.82
3.6 ct. 8.44 71.17
3.7 ct. 8.52 72.51
3.8 ct. 8.59 73.84
3.9 ct. 8.67 75.15
4 ct. 8.74 76.45
4.1 ct. 8.82 77.75
4.2 ct. 8.89 79.03
4.3 ct. 8.96 80.31
4.4 ct. 9.03 81.57
4.5 ct. 9.10 82.83
4.6 ct. 9.17 84.07
4.7 ct. 9.24 85.31
4.8 ct. 9.30 86.54
4.9 ct. 9.37 87.76
5 ct. 9.43 88.97

Princess Carat Size vs. Surface Area

The diamond size chart below shows how surface area increases with carat weight.

While most people think carat weight means size (or how big a diamond looks), carat is actually a measure of weight. Diamonds of the same carat weight can look bigger or smaller depending on how they are cut. For instance, a diamond with a deeper cut will appear smaller than a diamond with a shallower cut.

Why you ask? Well, imagine two men who weight 200 lbs (or 90 kgs) - but, one man if very short and the other is very, very tall. The tall man might look slender, while the short man would look quite fat. Diamonds are the same way. Diamonds with a "shorter" cut will look wider and appear larger in an engagement ring setting. This sounds great, but it can also hurt the diamonds ability to sparkle (same thing for diamonds cut too "tall").

princess cut diamond size chart

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