How big is a 1.5 carat baguette diamond?

By HeyGema™ · Updated

In short

A 1.5 carat baguette diamond measures about 9.2 x 4.6 mm. It faces up 2% smaller than a round diamond of the same weight. On a size 6 finger it covers 28% of the width. For the same weight, a round diamond is 7.4 mm.

Carat to mm calculator

About 9.2 x 4.6 mm

An estimate for a well-cut stone. A deep or shallow cut faces up smaller or bigger.

1.5 ct baguette
9.2 x 4.6 mm
1.5 ct round
7.4 mm
Side by side
1.5 ct baguette inside 1.5 ct round
A 1.5 carat baguette diamond beside a 1.5 carat round, to the same scale.

1.5 carat baguette diamond size

A well-cut 1.5 carat baguette diamond measures about 9.2 x 4.6 mm (0.36 x 0.18 inches) at a length-to-width ratio of 2.00:1. It faces up 2% smaller than a round diamond of the same weight. It weighs 0.30 grams.

1.5 carat baguette size by length-to-width ratio

The same weight can be long and narrow or short and wide. These are 1.5 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.

1.50:1
Length x width: 7.9 x 5.3 mm
Width on the finger: 32% of a size 6 finger
2.00:1
Length x width: 9.2 x 4.6 mm
Width on the finger: 28% of a size 6 finger
2.50:1
Length x width: 10.2 x 4.1 mm
Width on the finger: 25% of a size 6 finger
3.00:1
Length x width: 11.2 x 3.7 mm
Width on the finger: 23% of a size 6 finger

1.5 carat baguette on a finger

4.6 mm
4.6 mm stone on a 16.5 mm finger: it covers 28% of the widthA 1.5 carat baguette diamond on a size 6 finger.
4
Finger width: 14.9 mm
Baguette covers: 31%
5
Finger width: 15.7 mm
Baguette covers: 29%
6
Finger width: 16.5 mm
Baguette covers: 28%
7
Finger width: 17.3 mm
Baguette covers: 26%
8
Finger width: 18.1 mm
Baguette covers: 25%
9
Finger width: 18.9 mm
Baguette covers: 24%

Baguette sizes near 1.5 carat

1 carat
Length x width: 8.0 x 4.0 mm
Round of the same weight: 6.5 mm
1.25 carat
Length x width: 8.6 x 4.3 mm
Round of the same weight: 6.9 mm
1.5 (this page)
Length x width: 9.2 x 4.6 mm
Round of the same weight: 7.4 mm
1.75 carat
Length x width: 9.6 x 4.8 mm
Round of the same weight: 7.8 mm
2 carat
Length x width: 10.1 x 5.0 mm
Round of the same weight: 8.1 mm

1.5 carat in other shapes

Every row is a well-cut diamond of 1.5 carat. The last column is the face-up size against the baguette.

Round
Length x width: 7.4 mm
Against baguette: +2%
Oval
Length x width: 9.2 x 6.3 mm
Against baguette: +8%
Cushion
Length x width: 6.4 x 6.4 mm
Against baguette: -12%
Princess
Length x width: 6.3 x 6.3 mm
Against baguette: -6%
Emerald cut
Length x width: 8.0 x 5.7 mm
Against baguette: +6%
Asscher
Length x width: 6.3 x 6.3 mm
Against baguette: -14%
Radiant
Length x width: 7.4 x 5.7 mm
Against baguette: same
Pear
Length x width: 9.7 x 6.3 mm
Against baguette: -1%
Marquise
Length x width: 11.9 x 6.0 mm
Against baguette: +18%
Heart
Length x width: 7.4 x 7.4 mm
Against baguette: -15%
Trillion
Length x width: 8.0 x 8.0 mm
Against baguette: -12%

Questions

A 1.5 carat baguette diamond is about 9.2 x 4.6 mm at the usual 2.00:1 ratio.
No. Face-up, a 1.5 carat baguette is 2% smaller than a 1.5 carat round (7.4 mm).
There is no rule. The stone is 31% of the width of a size 4 finger and 25% of a size 8. 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.

More size charts