Question: I read recently that 300cc implants are the approximate size of grapefruits. Is that true? Or is another representation more accurate?Answer: Comparing breast implants to fruit is no usually a good representation. However, your plastic surgeon, or one you are consulting with, should be able to provide you with 300cc external sizers that give you a relatively accurate idea of weight and size. Our office has 3D imaging that allows us to show our patients exactly how the size they are enquiring about -- in this case 300cc -- would look on their frame. If you are trying to get an idea of weight, but certainly not shape, add 300cc of water or rice to a freezer bag and examine the volume. I hope this helps.