Diamond Size Chart

Diamond Size Chart | Northfire Jewelry

Select a shape and carat weight to see how your diamond will look.

Choose a shape
Choose carat weight
Diamond
Size 6
finger
← actual
proportion
Round · 1.00 ct · 6.5 mm

Round — 1.00 ct

Carat 1.00 ct
Dimensions 6.5 mm
Depth 3.9 mm
L/W Ratio 1.00
Shop Round Rings
All sizes compared
Full size reference
Carat Dimensions (mm) Depth (mm) L/W Ratio
Tip: On a size 6 finger, a 1.00 ct round diamond measures about 6.5 mm wide — roughly the width of a pencil eraser. A 2.00 ct round is about 8.1 mm. Not sure what size is right for you? Contact our team — we're happy to help.