Heart vs Pear diamond size

By HeyGema™ · Updated November 5, 2026

In short

A 1 carat heart measures 6.5 x 6.5 mm and a 1 carat pear 8.5 x 5.5 mm. At the same weight a pear faces up about 17% larger than a heart. In face-up terms, 1 carat of heart looks like a 0.76 carat round and 1 carat of pear like a 0.96 carat round.

6.5 x 6.5 mm1 ct heart
8.5 x 5.5 mm1 ct pear
+17%pear face-up vs heart

Carat to mm calculator

ShapeGemCaratLength to width

About 8.5 x 5.5 mm

An estimate for a well-cut stone. A deep or shallow cut faces up smaller or bigger.

1 ct heart

6.5 x 6.5 mm

1 ct pear

8.5 x 5.5 mm

Side by side

1 ct heart inside 1 ct pear

A 1 carat heart and a 1 carat pear diamond, to the same scale.

Heart vs Pear diamond size at the same weight

At the same weight a pear faces up about 17% larger than a heart. A 1 carat heart measures 6.5 x 6.5 mm and a 1 carat pear 8.5 x 5.5 mm. A 1 carat heart faces up like a 0.76 carat round, and a 1 carat pear like a 0.96 carat round.

0.5 carat: Heart length x width: 5.2 x 5.2 mm; Pear length x width: 6.7 x 4.4 mm; Pear face-up vs heart: +17%

0.75 carat: Heart length x width: 5.9 x 5.9 mm; Pear length x width: 7.7 x 5.0 mm; Pear face-up vs heart: +17%

1 carat: Heart length x width: 6.5 x 6.5 mm; Pear length x width: 8.5 x 5.5 mm; Pear face-up vs heart: +17%

1.5 carat: Heart length x width: 7.4 x 7.4 mm; Pear length x width: 9.7 x 6.3 mm; Pear face-up vs heart: +17%

2 carat: Heart length x width: 8.2 x 8.2 mm; Pear length x width: 10.7 x 6.9 mm; Pear face-up vs heart: +17%

3 carat: Heart length x width: 9.4 x 9.4 mm; Pear length x width: 12.3 x 7.9 mm; Pear face-up vs heart: +17%

Carat	Heart length x width	Pear length x width	Pear face-up vs heart
0.5 carat	5.2 x 5.2 mm	6.7 x 4.4 mm	+17%
0.75 carat	5.9 x 5.9 mm	7.7 x 5.0 mm	+17%
1 carat	6.5 x 6.5 mm	8.5 x 5.5 mm	+17%
1.5 carat	7.4 x 7.4 mm	9.7 x 6.3 mm	+17%
2 carat	8.2 x 8.2 mm	10.7 x 6.9 mm	+17%
3 carat	9.4 x 9.4 mm	12.3 x 7.9 mm	+17%

Heart vs Pear on a finger

A 1 carat heart covers 39% of the width of a size 6 finger and a 1 carat pear covers 33%. Long cuts sit along the finger, so their width is what shows across it.

6.3 mm stone on a 16.5 mm finger: it covers 38% of the widthA 1.5 carat pear on a size 6 finger.

4: Finger width: 14.9 mm; 1.5 ct heart covers: 50%; 1.5 ct pear covers: 42%

5: Finger width: 15.7 mm; 1.5 ct heart covers: 47%; 1.5 ct pear covers: 40%

6: Finger width: 16.5 mm; 1.5 ct heart covers: 45%; 1.5 ct pear covers: 38%

7: Finger width: 17.3 mm; 1.5 ct heart covers: 43%; 1.5 ct pear covers: 36%

8: Finger width: 18.1 mm; 1.5 ct heart covers: 41%; 1.5 ct pear covers: 35%

US ring size	Finger width	1.5 ct heart covers	1.5 ct pear covers
4	14.9 mm	50%	42%
5	15.7 mm	47%	40%
6	16.5 mm	45%	38%
7	17.3 mm	43%	36%
8	18.1 mm	41%	35%

Match the look, not only the carat

Because a pear of about 0.79 carat faces up like 1 carat of heart, comparing by weight alone hides the difference. Compare millimeters, or put both stones side by side in the size comparison tool.

Heart and Pear size charts

Full charts from 0.25 to 5 carat: Heart diamond size chart and Pear diamond size chart.

Questions

At the same weight a pear faces up about 17% larger than a heart. Face-up area is what you see from above; the pear has more of it at equal weight.

A 1 carat heart is about 6.5 x 6.5 mm and a 1 carat pear about 8.5 x 5.5 mm, for a well-cut stone at the usual ratio.

A 2 carat heart is 8.2 x 8.2 mm and a 2 carat pear is 10.7 x 6.9 mm. Face-up, the pear is +17% against the heart.

A 1 carat heart covers 39% of the width of a size 6 finger and a 1 carat pear 33%. The numbers change with ring size and with the stone's length-to-width ratio.