Size guide

What a 2.5 carat diamond actually looks like on your hand.

Very large. Balances best on longer or fuller fingers.

All 9 shapes at 2.5ct

Same carat weight. Very different footprint.

Carat is a weight, not a size. Because shapes distribute weight differently, a 2.5ct oval covers a lot more finger than a 2.5ct round.

Round

8.7 × 8.7 mm

Oval

11.3 × 8 mm

Cushion

8.6 × 8.6 mm

Emerald

10.8 × 7.7 mm

Pear

12.2 × 7.7 mm

Radiant

10 × 7.9 mm

Princess

8 × 8 mm

Marquise

13.8 × 6.9 mm

Moval

12.4 × 6.5 mm

2.5 carat — spec table

Shape	Length	Width	L/W ratio
Round	8.7 mm	8.7 mm	1.00
Oval	11.3 mm	8 mm	1.41
Cushion	8.6 mm	8.6 mm	1.00
Emerald	10.8 mm	7.7 mm	1.40
Pear	12.2 mm	7.7 mm	1.58
Radiant	10 mm	7.9 mm	1.27
Princess	8 mm	8 mm	1.00
Marquise	13.8 mm	6.9 mm	2.00
Moval	12.4 mm	6.5 mm	1.91

Price feel

Very large. Reads across a room.

Lab-grown

$4,500–$7,500

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

Natural

$28,000–$48,000

Higher upfront. Retains meaningful long-term value.

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

Other sizes