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Center Stone Size Guide

Quick Guide to Popular Center Stone Sizes

Not sure what size center stone you want? Use the following charts to help you decided!
You can also find the matching millimeter size to your desired carat weight.
Round Brilliant

0.25 ct. – 4.1 mm
0.50 ct. – 5.2 mm
0.75 ct.-  5.8 mm
1.00 ct.-  6.5 mm
1.25 ct. –  7.0 mm
1.50 ct. –  7.4 mm
1.75 ct. –  7.8 mm
2.00 ct. – 8.2 mm

Square/Princess Cut/Cushion

0.23 ct. – 3.5 mm
0.50 ct. – 4.5 mm
0.75 ct.-  5.0 mm
1.00 ct.-  5.5 mm
1.25 ct. – 6.0 mm
1.50 ct. – 6.5 mm
1.75 ct. –  7.0 mm
2.00 ct. – 7.5 mm

Emerald Cut

0.29 ct. – 5×3 mm
0.50 ct. – 6×4 mm
0.75 ct.- 6.5×4.5 mm
1.00 ct.- 7×5 mm
1.25 ct. – 7.3×5.5 mm
1.50 ct. – 7.5×5.5 mm
1.75 ct. – 8×6 mm
2.00 ct. – 8.5×6.5 mm

Oval Cut

0.25 ct. – 5×3 mm
0.50 ct. – 6×4 mm
0.75 ct.-  7×5 mm
1.00 ct.-  7.5×5.5 mm
1.25 ct. – 8×6 mm
1.50 ct. – 8.5×6.5 mm
1.75 ct. – 9×6 mm
2.00 ct. – 9×7 mm

Pear Cut

0.25 ct. – 5×3 mm
0.50 ct. – 6×4 mm
0.75 ct.-  7×5 mm
1.00 ct.-  8×5 mm
1.25 ct. – 8×6 mm
1.50 ct. – 9×6 mm
1.75 ct. – 9.5×6.5 mm
2.00 ct. – 10×7 mm