5 carat vs 10 carat diamond size
By HeyGema™ · Updated
In short
A round 10 carat diamond measures 13.9 mm and a round 5 carat 11.0 mm. The 10 carat is twice the weight but only 26% wider (2.9 mm), with 59% more face-up area.
- 11.0 vs 13.9 mmround diameter
- 26%wider at 10 ct
- 59%more face-up area
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.
5 carat vs 10 carat: how much bigger is it?
A 10 carat diamond weighs twice the weight of a 5 carat, but it is only 26% wider. A round 5 carat measures 11.0 mm and a round 10 carat 13.9 mm, a difference of 2.9 mm. Seen from above, the 10 carat covers 59% more area.
The gap is smaller than the weights suggest because carats measure weight, which grows with volume. A stone that is twice as heavy is the cube root of two (1.26 times) as wide, not twice as wide.
5 carat and 10 carat in every shape
- Round
- 5 carat: 11.0 mm
- 10 carat: 13.9 mm
- Longer by: 2.9 mm
- Oval
- 5 carat: 13.7 x 9.4 mm
- 10 carat: 17.2 x 11.8 mm
- Longer by: 3.6 mm
- Cushion
- 5 carat: 9.6 x 9.6 mm
- 10 carat: 12.1 x 12.1 mm
- Longer by: 2.5 mm
- Princess
- 5 carat: 9.4 x 9.4 mm
- 10 carat: 11.8 x 11.8 mm
- Longer by: 2.4 mm
- Emerald cut
- 5 carat: 12.0 x 8.5 mm
- 10 carat: 15.1 x 10.8 mm
- Longer by: 3.1 mm
- Pear
- 5 carat: 14.5 x 9.4 mm
- 10 carat: 18.3 x 11.8 mm
- Longer by: 3.8 mm
- Marquise
- 5 carat: 17.8 x 8.9 mm
- 10 carat: 22.4 x 11.2 mm
- Longer by: 4.6 mm
- Radiant
- 5 carat: 11.1 x 8.5 mm
- 10 carat: 14.0 x 10.8 mm
- Longer by: 2.9 mm
- Asscher
- 5 carat: 9.4 x 9.4 mm
- 10 carat: 11.8 x 11.8 mm
- Longer by: 2.4 mm
- Heart
- 5 carat: 11.1 x 11.1 mm
- 10 carat: 14.0 x 14.0 mm
- Longer by: 2.9 mm
5 carat vs 10 carat on a finger
- 4
- Finger width: 14.9 mm
- Round 5 ct covers: 74%
- Round 10 ct covers: 93%
- 5
- Finger width: 15.7 mm
- Round 5 ct covers: 70%
- Round 10 ct covers: 89%
- 6
- Finger width: 16.5 mm
- Round 5 ct covers: 67%
- Round 10 ct covers: 84%
- 7
- Finger width: 17.3 mm
- Round 5 ct covers: 64%
- Round 10 ct covers: 80%
- 8
- Finger width: 18.1 mm
- Round 5 ct covers: 61%
- Round 10 ct covers: 77%
On a size 6 finger the 5 carat reads as statement (67% of the width) and the 10 carat as statement (84%). The bands are our own: delicate is under 30% of the finger's width, classic is 30% to 44%, bold is 45% to 59%, statement is 60% and more.
Other cuts at 5 and 10 carat
Shape changes the picture. An oval or a pear of 5 carat can face up as large as a round of a higher weight. See the shapes that look biggest, or compare any two stones with the size comparison tool.