How big is a 1.25 carat oval diamond?
By HeyGema™ · Updated
In short
A 1.25 carat oval diamond measures about 8.6 x 5.9 mm. It faces up 6% bigger 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.
- 8.6 x 5.9 mm1.25 carat oval
- 0.34 x 0.23 inthe same in inches
- +6%face-up size vs a round
- 36%of a size 6 finger's width
Carat to mm calculator
About 8.6 x 5.9 mm
An estimate for a well-cut stone. A deep or shallow cut faces up smaller or bigger.
1.25 carat oval diamond size
A well-cut 1.25 carat oval diamond measures about 8.6 x 5.9 mm (0.34 x 0.23 inches) at a length-to-width ratio of 1.45:1. It faces up 6% bigger than a round diamond of the same weight. It weighs 0.25 grams.
1.25 carat oval 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.
- 1.25:1
- Length x width: 8.0 x 6.4 mm
- Width on the finger: 39% of a size 6 finger
- 1.35:1
- Length x width: 8.3 x 6.1 mm
- Width on the finger: 37% of a size 6 finger
- 1.45:1
- Length x width: 8.6 x 5.9 mm
- Width on the finger: 36% of a size 6 finger
- 1.55:1
- Length x width: 8.9 x 5.7 mm
- Width on the finger: 35% of a size 6 finger
1.25 carat oval on a finger
- 4
- Finger width: 14.9 mm
- Oval covers: 40%
- 5
- Finger width: 15.7 mm
- Oval covers: 38%
- 6
- Finger width: 16.5 mm
- Oval covers: 36%
- 7
- Finger width: 17.3 mm
- Oval covers: 34%
- 8
- Finger width: 18.1 mm
- Oval covers: 33%
- 9
- Finger width: 18.9 mm
- Oval covers: 31%
Oval sizes near 1.25 carat
- 0.75 carat
- Length x width: 7.3 x 5.0 mm
- Round of the same weight: 5.9 mm
- 1 carat
- Length x width: 8.0 x 5.5 mm
- Round of the same weight: 6.5 mm
- 1.25 (this page)
- Length x width: 8.6 x 5.9 mm
- Round of the same weight: 6.9 mm
- 1.5 carat
- Length x width: 9.2 x 6.3 mm
- Round of the same weight: 7.4 mm
- 1.75 carat
- Length x width: 9.6 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 oval.
- Round
- Length x width: 6.9 mm
- Against oval: -5%
- Cushion
- Length x width: 6.0 x 6.0 mm
- Against oval: -19%
- Princess
- Length x width: 5.9 x 5.9 mm
- Against oval: -13%
- Emerald cut
- Length x width: 7.5 x 5.4 mm
- Against oval: -2%
- Asscher
- Length x width: 5.9 x 5.9 mm
- Against oval: -20%
- Radiant
- Length x width: 7.0 x 5.4 mm
- Against oval: -8%
- Pear
- Length x width: 9.2 x 5.9 mm
- Against oval: -8%
- Marquise
- Length x width: 11.2 x 5.6 mm
- Against oval: +9%
- Heart
- Length x width: 7.0 x 7.0 mm
- Against oval: -22%
- Trillion
- Length x width: 7.5 x 7.5 mm
- Against oval: -18%
- Baguette
- Length x width: 8.6 x 4.3 mm
- Against oval: -7%