What does a 3 carat diamond look like on a finger?
By HeyGema™ · Updated
In short
A round 3 carat diamond is 9.3 mm across and covers 63% of the width of a size 4 finger, 56% of a size 6 and 51% of a size 8. On a size 6 that is a bold look. An oval of the same weight is 11.5 x 7.9 mm.
- 9.3 mmround, across
- 63%of a size 4 finger
- 56%of a size 6 finger
- 51%of a size 8 finger
Diamond size on a finger
3 ct diamond round: 9.3 mm, 56% of a size 6 finger.
The stone sits along the finger, so its width is what shows against the finger. Drawn to scale from the chart on this page.
3 carat oval on a size 6 finger
3 carat emerald cut on a size 6 finger
3 carat diamond on a finger, by ring size and shape
The share of the finger's width the stone covers. Bold means 45% to 59%; statement means 60% and more.
- 4
- Finger width: 14.9 mm
- Round: 63%
- Oval: 53%
- Cushion: 54%
- Emerald cut: 48%
- Princess: 53%
- Pear: 53%
- 5
- Finger width: 15.7 mm
- Round: 59%
- Oval: 51%
- Cushion: 51%
- Emerald cut: 46%
- Princess: 51%
- Pear: 51%
- 6
- Finger width: 16.5 mm
- Round: 56%
- Oval: 48%
- Cushion: 49%
- Emerald cut: 44%
- Princess: 48%
- Pear: 48%
- 7
- Finger width: 17.3 mm
- Round: 54%
- Oval: 46%
- Cushion: 47%
- Emerald cut: 42%
- Princess: 46%
- Pear: 46%
- 8
- Finger width: 18.1 mm
- Round: 51%
- Oval: 44%
- Cushion: 45%
- Emerald cut: 40%
- Princess: 44%
- Pear: 44%
- 9
- Finger width: 18.9 mm
- Round: 49%
- Oval: 42%
- Cushion: 43%
- Emerald cut: 38%
- Princess: 42%
- Pear: 42%
The four looks are our own bands for the share of the finger's width a stone covers: delicate under 30% of the finger's width; classic 30% to 44%; bold 45% to 59%; statement 60% and more. They are a way to read the numbers, not a rule.
3 carat in millimeters
A round 3 carat diamond is 9.3 mm (0.37 inches) across. For every shape see the 3 carat diamond size chart, or open one shape: round, oval, cushion, emerald cut.