Size guide

What a 3 carat diamond actually looks like on your hand.

Reads big in every photo. Consider halo-less settings to keep it graceful.

All 9 shapes at 3ct

Same carat weight. Very different footprint.

Carat is a weight, not a size. Because shapes distribute weight differently, a 3ct oval covers a lot more finger than a 3ct round.

Round

9.3 × 9.3 mm

Oval

12.2 × 8.5 mm

Cushion

9.2 × 9.2 mm

Emerald

11.6 × 8.2 mm

Pear

13 × 8.1 mm

Radiant

10.8 × 8.4 mm

Princess

8.5 × 8.5 mm

Marquise

14.8 × 7.4 mm

Moval

13.3 × 7 mm

3 carat — spec table

Shape	Length	Width	L/W ratio
Round	9.3 mm	9.3 mm	1.00
Oval	12.2 mm	8.5 mm	1.44
Cushion	9.2 mm	9.2 mm	1.00
Emerald	11.6 mm	8.2 mm	1.41
Pear	13 mm	8.1 mm	1.60
Radiant	10.8 mm	8.4 mm	1.29
Princess	8.5 mm	8.5 mm	1.00
Marquise	14.8 mm	7.4 mm	2.00
Moval	13.3 mm	7 mm	1.90

Price feel

Serious presence. Editorial territory.

Lab-grown

$6,000–$10,000

Same look, dramatically lower cost. Little to no resale value.

Natural

$45,000–$80,000

Higher upfront. Retains meaningful long-term value.

True-to-scale, in every shape, in seconds.

Other sizes