How big is a 2.5 carat radiant cut diamond?
By HeyGema™ · Updated
In short
A 2.5 carat radiant cut diamond measures about 8.8 x 6.8 mm. It faces up 2% smaller than a round diamond of the same weight. On a size 6 finger it covers 41% of the width. For the same weight, a round diamond is 8.8 mm.
- 8.8 x 6.8 mm2.5 carat radiant
- 0.35 x 0.27 inthe same in inches
- -2%face-up size vs a round
- 41%of a size 6 finger's width
Carat to mm calculator
About 8.8 x 6.8 mm
An estimate for a well-cut stone. A deep or shallow cut faces up smaller or bigger.
2.5 carat radiant diamond size
A well-cut 2.5 carat radiant cut diamond measures about 8.8 x 6.8 mm (0.35 x 0.27 inches) at a length-to-width ratio of 1.30:1. It faces up 2% smaller than a round diamond of the same weight. It weighs 0.50 grams.
2.5 carat radiant size by length-to-width ratio
The same weight can be long and narrow or short and wide. These are 2.5 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.
- 1.00:1
- Length x width: 7.7 x 7.7 mm
- Width on the finger: 47% of a size 6 finger
- 1.15:1
- Length x width: 8.3 x 7.2 mm
- Width on the finger: 44% of a size 6 finger
- 1.30:1
- Length x width: 8.8 x 6.8 mm
- Width on the finger: 41% of a size 6 finger
- 1.40:1
- Length x width: 9.2 x 6.5 mm
- Width on the finger: 40% of a size 6 finger
2.5 carat radiant on a finger
- 4
- Finger width: 14.9 mm
- Radiant covers: 46%
- 5
- Finger width: 15.7 mm
- Radiant covers: 43%
- 6
- Finger width: 16.5 mm
- Radiant covers: 41%
- 7
- Finger width: 17.3 mm
- Radiant covers: 39%
- 8
- Finger width: 18.1 mm
- Radiant covers: 37%
- 9
- Finger width: 18.9 mm
- Radiant covers: 36%
Radiant sizes near 2.5 carat
- 2 carat
- Length x width: 8.2 x 6.3 mm
- Round of the same weight: 8.1 mm
- 2.25 carat
- Length x width: 8.5 x 6.6 mm
- Round of the same weight: 8.5 mm
- 2.5 (this page)
- Length x width: 8.8 x 6.8 mm
- Round of the same weight: 8.8 mm
- 3 carat
- Length x width: 9.4 x 7.2 mm
- Round of the same weight: 9.3 mm
- 3.5 carat
- Length x width: 9.9 x 7.6 mm
- Round of the same weight: 9.8 mm
2.5 carat in other shapes
Every row is a well-cut diamond of 2.5 carat. The last column is the face-up size against the radiant.
- Round
- Length x width: 8.8 mm
- Against radiant: +2%
- Oval
- Length x width: 10.9 x 7.5 mm
- Against radiant: +8%
- Cushion
- Length x width: 7.6 x 7.6 mm
- Against radiant: -12%
- Princess
- Length x width: 7.5 x 7.5 mm
- Against radiant: -6%
- Emerald cut
- Length x width: 9.5 x 6.8 mm
- Against radiant: +6%
- Asscher
- Length x width: 7.5 x 7.5 mm
- Against radiant: -13%
- Pear
- Length x width: 11.5 x 7.5 mm
- Against radiant: same
- Marquise
- Length x width: 14.1 x 7.1 mm
- Against radiant: +19%
- Heart
- Length x width: 8.8 x 8.8 mm
- Against radiant: -15%
- Trillion
- Length x width: 9.5 x 9.5 mm
- Against radiant: -11%
- Baguette
- Length x width: 10.9 x 5.4 mm
- Against radiant: same