L:W Ratio of Diamonds

The length-to-width ratio compares a diamonds length to its width to show how elongated fancy-shaped diamond appears when viewed from above. This ratio is subjective; some people favor a more elongated appearance, or a chubby appearance, while others prefer a more balanced shape. Below are the most popular length-to-width ratios for fancy shapes.

Ex. A emerald-cut diamond that measures 7.00 mm long by 5.00mm has a length-to-width ratio of 1.4 (7.00/5.00) and will appear elongated.

Most Popular Length-to-Width Ratios:

Round: 1.00-1.02
Oval: 1.30-1.50
Emerald: 1.40-1.50
Cushion: 1.00-1.10
Elongated Cushion: 1.20-1.40
Radiant:1.00-1.05
Princess: 1.00-1.05
Marquise: 1.70-2.15
Pear: 1.50-1.70
Asscher: 1.00-1.10
Heart: 0.90-1.10