Thank you for the question.
Personally, I do not believe that the “rice test” is an accurate way to determine what breast implant size/profile will best meet your goals. I have seen too many patients present for revisionary breast surgery who have used this technique and have been dissatisfied with the results of surgery (usually regret not going bigger). I think that at best this test will allow you to get in the “ballpark”, but is not precise.
It will be important, prior to undergoing revisionary breast surgery that you have a full discussion regarding your desired goals with your plastic surgeon. This communication will be critical in determining which operation and/or breast implant size/type/profile will most likely help achieve your goals.
In my practice, the use of photographs of “goal” pictures (and breasts that are too big or too small) is very helpful.
I have found that the use of words such as “natural” or "D cup” etc means different things to different people and therefore prove unhelpful.
Also, as you know, cup size varies depending on who makes the bra; therefore, discussing desired cup size may also be inaccurate.
Once you feel you have communicated your goals clearly, allow your plastic surgeon to use his/her years of experience/judgment to choose the breast implant size/profile that will best meet your goals. Again, in my practice, this decision is usually made during surgery.
I hope this helps.