I know that this is individual but wanted to ask experts and buyers too, what appears to be the most common carat size that individuals upgrade too? Also, I have read in this great site(by the way)that after a while many people feel that the size shrinks. I have a 4.5 ring size and would like this to be my last diamond. This is a size only question. Know what cut and clarity that are optimal. Thanks for everyone''s opinions. Reds
