The shape of the cushion cut is characterized by soft edges and round corners, resembling a cushion or pillow. This type of cut has been popular since the first diamond cuts were developed. Cushion cut diamonds range from a more square shape to rectangular.
If you prefer the squarer shape, look for a length-to-width ratio of 1.05 to 1.10:1. For a more rectangular shape, look for length-to-width ratios of greater than 1.15:1.