^ You have to remember that twice the volume IS NOT twice the size. It is only 1/8 the size difference. In other words, if you wish to go from a 10 inch size ball to a 20 inch size ball, your volume required to physically double the size of the ball is eight times. That is why as some of these models maybe adding a lot of weight but the size difference is not that great. It is called diminishing returns. At 4400 ccs, her implants weighed approximately 9.7 pounds each. At 5500 ccs, her implants weigh approximately 12.1 pounds each. At 10,000 ccs, each would weigh approximately 22 pounds each. Yet, while the weight increases enormously, the size does not.