Round MM Size Round Carat Weight
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2.75 mm. 0.08 ct.
3 mm. 0.10 ct.
3.25 mm. 0.14 ct.
3.5 mm. 0.17 ct.
What's the smallest diamond size?
The smallest sizes are typically Round Brilliant cut Diamonds. Small fully cut round Diamonds are often referred to as "Stars" up to and including 1.7mm (approx. 0.02cts each.) View our additional information on where to buy small diamonds within our knowledge base.