I previously posted something on choosing the best diamond, however, I did not have the correct photos. After having a long conversation with a diamond expert I was able to make a decission. however, now that I have the diamond picked out I''ve stumbled across more obstacles. First of all, do you all think a 1.04ct diamond will stand out enough on a soliatire setting with a 2.5 width? Secondly, what about sizing? Every ring my girlfriend owns is a size 7 and fits her perfectly, but when we measured her finger according to the ring chart on the site where I''m purchasing the ring her size is a 7.50. Is it possible for their sizing to be that diffrent, or could we just be doing it incorrectly? What size should I go for?