How much does each 580cc silicone implant weigh ?

This sort of reminds me of the trick question: Which weighs more, a pound of sugar or a pound of flour? Obviously, they both weigh the same.The density of breast tissue, which is comprised of fat, water and other tissue elements, is less than that of water itself. So a pound of breast tissue weighs the same but is probably a little larger than a pound of water. 580cc is roughly about 1.25 lbsHope this is helpful

Approximately one and a third pounds.
Jon A Perlman MD FACS
Certified, Am Board of Plastic Surgery
Member, Am. Society for Aesthetic Plastic Surgery (ASAPS)
Beverly Hills, Ca