It depends on the size of the breast. If your breast is bigger then its going to weigh more
How much do the female reproductive organs weigh?
As much as your heart's desire
A size 40DDD breast can weigh as much as a newborn baby.
Female pandas weigh 220 pounds
Take one ounce of breast milk by volume and weigh it -- what is the weight?
How much does an 460cc of salin breast implant weight?
The weight of a human varies depending on how old the human is, and how portly or emaciated they are.
how much does a 225cc silicone breat implant weigh