there are 6 different size of a jewel ring : 6 - 6.5 - 7 - 7.5 - 8 - 8.5 USA size9 princess cut diamonds with a diameter of 1.5 mm have been used in it.Join me to make your own changes : https://www.linkedin.ir/in/forough-peivandi-502266303weight:size 6 : 14.75 gr 18 ky - 14.03 gr 18 kwsize 6.5: 15.01 18 ky - 14.28 gr 18 kwsize 7 : 5.26 gr 18 ky - 14.51 gr 18 kwsize 7.5 : 15.53 gr 18 ky - 14.78 gr 18 kwsize 8 : 15.80 gr 18 ky - 15.03 gr 18 kwsize 8.5 : 16.03 gr 18ky - 15.25 gr 18 kw