How big is a 10 carat round diamond?
By HeyGema™ · Updated
In short
A 10 carat round diamond measures about 13.9 mm. On a size 6 finger it covers 84% of the width. For the same weight, a round diamond is 13.9 mm.
- 13.9 mm10 carat round
- 0.55 inthe same in inches
- referenceface-up size vs a round
- 84%of a size 6 finger's width
Carat to mm calculator
About 13.9 x 13.9 mm
An estimate for a well-cut stone. A deep or shallow cut faces up smaller or bigger.
10 ct round
13.9 mm
10 ct round
13.9 mm
Side by side
10 ct round inside 10 ct round
10 carat round diamond size
A well-cut 10 carat round diamond measures about 13.9 mm (0.55 inches) at a length-to-width ratio of 1.00:1. It weighs 2.00 grams.
10 carat round on a finger
- 4
- Finger width: 14.9 mm
- Round covers: 93%
- 5
- Finger width: 15.7 mm
- Round covers: 89%
- 6
- Finger width: 16.5 mm
- Round covers: 84%
- 7
- Finger width: 17.3 mm
- Round covers: 80%
- 8
- Finger width: 18.1 mm
- Round covers: 77%
- 9
- Finger width: 18.9 mm
- Round covers: 73%
Round sizes near 10 carat
- 6 carat
- Length x width: 11.7 mm
- Round of the same weight: 11.7 mm
- 8 carat
- Length x width: 12.9 mm
- Round of the same weight: 12.9 mm
- 10 (this page)
- Length x width: 13.9 mm
- Round of the same weight: 13.9 mm
10 carat in other shapes
Every row is a well-cut diamond of 10 carat. The last column is the face-up size against the round.
- Oval
- Length x width: 17.2 x 11.8 mm
- Against round: +6%
- Cushion
- Length x width: 12.1 x 12.1 mm
- Against round: -14%
- Princess
- Length x width: 11.8 x 11.8 mm
- Against round: -8%
- Emerald cut
- Length x width: 15.1 x 10.8 mm
- Against round: +4%
- Asscher
- Length x width: 11.8 x 11.8 mm
- Against round: -16%
- Radiant
- Length x width: 14.0 x 10.8 mm
- Against round: -2%
- Pear
- Length x width: 18.3 x 11.8 mm
- Against round: -3%
- Marquise
- Length x width: 22.4 x 11.2 mm
- Against round: +16%
- Heart
- Length x width: 14.0 x 14.0 mm
- Against round: -17%
- Trillion
- Length x width: 15.1 x 15.1 mm
- Against round: -14%
- Baguette
- Length x width: 17.2 x 8.6 mm
- Against round: -2%
Questions
A 10 carat round diamond is about 13.9 mm at the usual 1.00:1 ratio.
A 10 carat round diamond is about 0.55 inches across.
There is no rule. The stone is wider than most fingers. 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.