Oval vs Pear diamond size

By HeyGema™ · Updated November 5, 2026

In short

A 1 carat oval measures 8.0 x 5.5 mm and a 1 carat pear 8.5 x 5.5 mm. At the same weight an oval faces up about 8% larger than a pear. In face-up terms, 1 carat of oval looks like a 1.09 carat round and 1 carat of pear like a 0.96 carat round.

8.0 x 5.5 mm1 ct oval
8.5 x 5.5 mm1 ct pear
-8%pear face-up vs oval

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 oval

8.0 x 5.5 mm

1 ct pear

8.5 x 5.5 mm

Side by side

1 ct oval inside 1 ct pear

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

Oval vs Pear diamond size at the same weight

At the same weight an oval faces up about 8% larger than a pear. A 1 carat oval measures 8.0 x 5.5 mm and a 1 carat pear 8.5 x 5.5 mm. A 1 carat oval faces up like a 1.09 carat round, and a 1 carat pear like a 0.96 carat round.

0.5 carat: Oval length x width: 6.3 x 4.4 mm; Pear length x width: 6.7 x 4.4 mm; Pear face-up vs oval: -8%

0.75 carat: Oval length x width: 7.3 x 5.0 mm; Pear length x width: 7.7 x 5.0 mm; Pear face-up vs oval: -8%

1 carat: Oval length x width: 8.0 x 5.5 mm; Pear length x width: 8.5 x 5.5 mm; Pear face-up vs oval: -8%

1.5 carat: Oval length x width: 9.2 x 6.3 mm; Pear length x width: 9.7 x 6.3 mm; Pear face-up vs oval: -8%

2 carat: Oval length x width: 10.1 x 6.9 mm; Pear length x width: 10.7 x 6.9 mm; Pear face-up vs oval: -8%

3 carat: Oval length x width: 11.5 x 7.9 mm; Pear length x width: 12.3 x 7.9 mm; Pear face-up vs oval: -8%

Carat	Oval length x width	Pear length x width	Pear face-up vs oval
0.5 carat	6.3 x 4.4 mm	6.7 x 4.4 mm	-8%
0.75 carat	7.3 x 5.0 mm	7.7 x 5.0 mm	-8%
1 carat	8.0 x 5.5 mm	8.5 x 5.5 mm	-8%
1.5 carat	9.2 x 6.3 mm	9.7 x 6.3 mm	-8%
2 carat	10.1 x 6.9 mm	10.7 x 6.9 mm	-8%
3 carat	11.5 x 7.9 mm	12.3 x 7.9 mm	-8%

Oval vs Pear on a finger

A 1 carat oval covers 33% 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 oval covers: 42%; 1.5 ct pear covers: 42%

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

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

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

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

US ring size	Finger width	1.5 ct oval covers	1.5 ct pear covers
4	14.9 mm	42%	42%
5	15.7 mm	40%	40%
6	16.5 mm	38%	38%
7	17.3 mm	36%	36%
8	18.1 mm	35%	35%

Match the look, not only the carat

Because a pear needs about 1.14 carat to face up like 1 carat of oval, comparing by weight alone hides the difference. Compare millimeters, or put both stones side by side in the size comparison tool.

Oval and Pear size charts

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

Questions

At the same weight an oval faces up about 8% larger than a pear. Face-up area is what you see from above; the oval has more of it at equal weight.

A 1 carat oval is about 8.0 x 5.5 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 oval is 10.1 x 6.9 mm and a 2 carat pear is 10.7 x 6.9 mm. Face-up, the pear is -8% against the oval.

A 1 carat oval covers 33% 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.