With pointed tips and rounded center, marquise-cut diamonds showcase brilliance and aesthetics. Marquise diamonds are fairly trendy and look sophisticated in an engagement ring. Like oval, emerald, radiant, cushion, and pear shapes, marquise cut stones come in narrow and wide sizes. It has an elongated shape that can make the wearer’s finger appear longer and slender. Our stone sizing chart below shows the standard sizes and matching carat weights for marquise-cut diamonds to help you find your perfect fit.



For actual stone sizes and measurements, you can download our Marquise Stone Sizing Guide.


Marquise Size (mm)

Marquise Carat Weight

Marquise Size (mm)

Marquise Carat Weight

3x1.5 mm.

0.025 ct.

9.5x4.7 mm.

0.85 ct.

3.5x1.75 mm.

0.065 ct.

10x5 mm.

1.00 ct.

3.5x2 mm.

0.07 ct.

11x5.5 mm.

1.25 ct.

4x2 mm.

0.10 ct.

11.5x6 mm.

1.33 ct.

3.75x1.75 mm.

0.11 ct.

12x6 mm.

1.50 ct.

4.25x2.25 mm.

0.12 ct.

13x6.5 mm.

2.00 ct.

5x2.5 mm.

0.14 ct.

14x7 mm.

2.50 ct.

5.5x2.75 mm.

0.16 ct.

15x7 mm.

3.00 ct.

5.5x3 mm.

0.18 ct.

14x8 mm.

3.00 ct.

5x3 mm.

0.20 ct.

15x7.5 mm.

3.25 ct.

6.5x3 mm.

0.23 ct.

15x8 mm.

3.44 ct.

6x3 mm.

0.25 ct.

16x8 mm.

3.86 ct.

7x3 mm.

0.30 ct.

16.5x8.25 mm.

4.00 ct.

7.5x3.5 mm.

0.33 ct.

17x8.5 mm.

4.88 ct.

7x4 mm.

0.34 ct.

17.5x10 mm.

5.50 ct.

8x4 mm.

0.50 ct.

20x8 mm.

7.08 ct.

8.75x4.25 mm.

0.70 ct.

20x10 mm.

7.94 ct.

9x4.5 mm.

0.75 ct.

20x11 mm.

9.50 ct.