Try On Diamond Size & Shape How to Compare Diamond Carat Weight: Click on the buttons below to view the relative size of different diamonds in a solitaire engagement ring. 2 carat total weight 1 1/2 carat total weight 1 carat total weight 3/4 carat total weight 1/2 carat total weight 1/3 carat total weight 1/4 carat total weight How to Compare Diamond Shape: Click on the buttons below to view the relative shape of different diamonds in a solitaire engagement ring. Assher Emerald Heart Marquise Oval Pear Princess Radiant Round