How big is a 1.25 carat pear shaped diamond?

By HeyGema™ · Updated

In short

A 1.25 carat pear shaped diamond measures about 9.2 x 5.9 mm. It faces up 3% smaller than a round diamond of the same weight. On a size 6 finger it covers 36% of the width. For the same weight, a round diamond is 6.9 mm.

Carat to mm calculator

About 9.2 x 5.9 mm

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

1.25 ct pear
9.2 x 5.9 mm
1.25 ct round
6.9 mm
Side by side
1.25 ct round inside 1.25 ct pear
A 1.25 carat pear diamond beside a 1.25 carat round, to the same scale.

1.25 carat pear diamond size

A well-cut 1.25 carat pear shaped diamond measures about 9.2 x 5.9 mm (0.36 x 0.23 inches) at a length-to-width ratio of 1.55:1. It faces up 3% smaller than a round diamond of the same weight. It weighs 0.25 grams.

1.25 carat pear size by length-to-width ratio

The same weight can be long and narrow or short and wide. These are 1.25 carat sizes at each ratio. A longer ratio runs the stone along the finger and makes it look slimmer. The face-up area stays almost the same.

1.40:1
Length x width: 8.7 x 6.2 mm
Width on the finger: 38% of a size 6 finger
1.50:1
Length x width: 9.0 x 6.0 mm
Width on the finger: 36% of a size 6 finger
1.55:1
Length x width: 9.2 x 5.9 mm
Width on the finger: 36% of a size 6 finger
1.60:1
Length x width: 9.3 x 5.8 mm
Width on the finger: 35% of a size 6 finger
1.70:1
Length x width: 9.6 x 5.6 mm
Width on the finger: 34% of a size 6 finger

1.25 carat pear on a finger

5.9 mm
5.9 mm stone on a 16.5 mm finger: it covers 36% of the widthA 1.25 carat pear diamond on a size 6 finger.
4
Finger width: 14.9 mm
Pear covers: 40%
5
Finger width: 15.7 mm
Pear covers: 38%
6
Finger width: 16.5 mm
Pear covers: 36%
7
Finger width: 17.3 mm
Pear covers: 34%
8
Finger width: 18.1 mm
Pear covers: 33%
9
Finger width: 18.9 mm
Pear covers: 31%

Pear sizes near 1.25 carat

0.75 carat
Length x width: 7.7 x 5.0 mm
Round of the same weight: 5.9 mm
1 carat
Length x width: 8.5 x 5.5 mm
Round of the same weight: 6.5 mm
1.25 (this page)
Length x width: 9.2 x 5.9 mm
Round of the same weight: 6.9 mm
1.5 carat
Length x width: 9.7 x 6.3 mm
Round of the same weight: 7.4 mm
1.75 carat
Length x width: 10.2 x 6.6 mm
Round of the same weight: 7.8 mm

1.25 carat in other shapes

Every row is a well-cut diamond of 1.25 carat. The last column is the face-up size against the pear.

Round
Length x width: 6.9 mm
Against pear: +3%
Oval
Length x width: 8.6 x 5.9 mm
Against pear: +9%
Cushion
Length x width: 6.0 x 6.0 mm
Against pear: -12%
Princess
Length x width: 5.9 x 5.9 mm
Against pear: -5%
Emerald cut
Length x width: 7.5 x 5.4 mm
Against pear: +7%
Asscher
Length x width: 5.9 x 5.9 mm
Against pear: -13%
Radiant
Length x width: 7.0 x 5.4 mm
Against pear: same
Marquise
Length x width: 11.2 x 5.6 mm
Against pear: +19%
Heart
Length x width: 7.0 x 7.0 mm
Against pear: -15%
Trillion
Length x width: 7.5 x 7.5 mm
Against pear: -11%
Baguette
Length x width: 8.6 x 4.3 mm
Against pear: +1%

Questions

A 1.25 carat pear shaped diamond is about 9.2 x 5.9 mm at the usual 1.55:1 ratio.
No. Face-up, a 1.25 carat pear is 3% smaller than a 1.25 carat round (6.9 mm).
There is no rule. The stone is 40% of the width of a size 4 finger and 33% of a size 8. Compare it with a ring you have tried on in the finger chart above.
Yes. A lab grown diamond has the same density as a mined one, so it measures the same for the same weight.

More size charts