Not sure the size of a particular diamond based on its carat weight? Our helpful guide breaks down diamond sizes by diamond shape and millimeter (mm) size.

This 4 mm round small diamond has a G-H color, SI1 clarity, and an Excellent cut. As part of our Premiere Melee Diamond Collection, it meets the highest diamond quality and calibration standards.

This prominent solitaire diamond engagement ring (4 mm) features a cathedral setting that extends elegantly on either side to frame your stone in a bold sheen of white gold. White gold prongs secure Comfort fit and proudly made in the USA.

A bold 4mm wide diamond engagement ring in platinum featuring a sleek flat band design and white gold prongs to secure your choice of center design.

This 4 mm round small diamond has an F color, VS2 clarity, and a Super Ideal cut. As part of our Luxury Melee Diamond Collection, it meets the highest diamond quality and calibration standards.

Wondering what a 1 carat round diamond looks link on a hand? Our round diamond size chart will help you convert millimeter (mm) size to carat size for round cut diamonds.

The ideal cut for a Heart shaped diamond is a square ratio of 1:1 for length and width. The chart below will help you convert the millimeter and carat weights for a heart cut diamond.

Princess Diamond Size Chart. Want to know the actual size of a 1 carat diamond on a hand? Use our diamond size chart to understand the millimeter (mm) size of each diamond shape.

A bold 4 mm wide diamond engagement ring in yellow gold, the flat band design creates a minimalist, modern impression designed to showcase your choice of a center diamond to maximum effect. Available in 14k or 18k yellow gold.

A contemporary 4 mm wide diamond engagement ring in rose gold, the flat band design combined with the rose gold tones creates a minimalist, modern impression designed to enhance your choice of center diamond. Available in 14k or 18k rose gold.