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4 carat engagement rings are true showstoppers — a round 4ct stone spans roughly 10.2mm. For maximum presence at an attainable price, most buyers choose moissanite or lab-created stones at this size. Custom-made in every cut and metal.
4 carat buying guide & FAQ
How big is a 4 carat ring? Around 10.2mm for a round stone — among the largest sizes worn as an engagement ring.
Natural or lab at 4 carats? Natural diamonds at 4ct are rare and priced accordingly; lab-created diamonds and moissanite deliver the same look for dramatically less.
Can I try the ring on before I buy it? Yes. For $199 Segal 3D-prints an exact replica of any ring design in your finger size so you can try it at home. You keep the replica, and the full $199 is credited toward the real ring (orders $1,000+, credit never expires). See Try It In Real Life.
Explore more: 3 carat · 1 carat · emerald cut · halo.
