This petals collection halo round engagement ring is stunning for your love one. Engineered with 20 round diamonds weighing 0. 20 carats, and 16 round diamonds with a total weight of 0. 16 carats in an enchanting design. To fit a 6. 5MM round shaped center. Additional Information: 20 round diamonds weighing 0. 20 carats, and 16 round diamonds with a total weight of 0. 16 carats.