A Guide By RoyxeLuxe

Diamond Size

Choosing a diamond is a personal decision, not just a technical one. Carat weight — the measure of a diamond’s mass — is where most journeys begin. Here is how to read it, and how to choose it.

01 — The Unit

What is a carat?

A carat equals 200 milligrams, or 0.2 grams. Every diamond is weighed individually to arrive at this figure — but carat is only one measure among several that define a stone's character.

Diamonds are graded on four criteria, known together as the 4 C's. No two stones are alike, even when their carat weight matches exactly.

CARAT
CUT
COLOR
CLARITY
02 — The Decision

Which carat weight is right for you?

Most clients gravitate naturally toward the 1-carat diamond — it remains the most requested size for a reason. If exceptional beauty within a considered budget matters more than the round number, a stone just under standard weight can carry nearly identical presence.

0.90 ct Reads visually as a full carat once set, at a noticeably gentler price point. Our most-recommended value pick.
1.00 ct The benchmark size — timeless, instantly recognizable, and the easiest to resize or re-set in future.
2.00 ct + A deliberate statement. At this weight, cut quality has an outsized effect on brilliance — worth prioritizing over size alone.
03 — True to Scale

The carat size chart

A visual reference built from our Signature Collection cut, shown at true relative scale — down to the millimeter.

Diamond Carat — Royceluxe Signature Collection
Round brilliant cut · diameters shown edge-to-edge in millimeters
Scroll to compare every size Reference: US dime for real-world scale Cut: Round brilliant
Your story deserves brilliance.

Let us help you find it.

Royceluxe offers ethically sourced, hand-selected diamonds matched to your vision — whether that means subtle sophistication or bold, unmistakable sparkle.

Shop Diamonds