How much bigger is 1.5ct vs 1ct?

About 15% wider face-up for a round. On the hand, the visible difference is real but not enormous.

Does finger size affect how big a ring looks?

Yes — dramatically. The same carat weight can read modest or huge depending on the finger.

What carat is 'average'?

The US median is around 1ct; the most-photographed engagement rings on Instagram are 1.5–2.5ct.

How do I compare shapes at the same carat weight?

Use the Discovery Room — every shape at every carat, rendered on your hand at true millimeter scale.

See what a carat actually looks like.

What's the difference between 1ct and 1.5ct on my hand?

Carat is weight, not size. See what each carat weight actually looks like on your specific finger, at true millimeter scale.

Start a try-on

What it actually looks like

Carat is a unit of weight, not size. A 1ct round is 6.5mm across. A 1ct oval is 8.5 × 6.5mm. A 1ct emerald is 7 × 5mm. Same weight, very different face-up presence.

The other thing carat charts leave out: your finger. A 1.5ct on a size-4 finger reads huge. A 1.5ct on a size-9 finger reads modest. Perceived size is finger coverage, not carat weight.

The Compare tool lets you see all four common sizes on your specific finger, side by side. Pick the one that reads right — not the one that sounds right.

In this guide

Carat vs. mm at true scale
How finger size changes perceived carat
Comparing 1ct, 1.5ct, 2ct, 3ct side-by-side
Finger coverage percentage explained

Finger coverage percentages

On a size-6 finger, a 1ct round covers about 40% of the finger width. 1.5ct is around 46%. 2ct is around 51%. Above 55% starts to feel dramatic; above 65% is statement territory.

Start a try-on →

FAQ

Common questions

How much bigger is 1.5ct vs 1ct?: About 15% wider face-up for a round. On the hand, the visible difference is real but not enormous.
Does finger size affect how big a ring looks?: Yes — dramatically. The same carat weight can read modest or huge depending on the finger.
What carat is 'average'?: The US median is around 1ct; the most-photographed engagement rings on Instagram are 1.5–2.5ct.
How do I compare shapes at the same carat weight?: Use the Discovery Room — every shape at every carat, rendered on your hand at true millimeter scale.

More use case

Keep exploring.

Try it on before you spend.

The at-home rehearsal for the appointment. See the ring on your hand before you sit down with a jeweler.

Read →

At home. On your couch. No appointment.

Snap a photo, pick a ring, see it at true scale on your hand. That's the whole thing.

Read →

Share the ring you want.

Send a link. Build a Hint Hint wishlist. Let them see exactly what makes your heart do the thing.

Read →