The weight of saline breast implants varies by size. Typically, a pair of 300 cubic centimeter saline implants weighs approximately 1.26 lbs. while each implant weighs 0.63 lbs., notes Dr. Robert Singer.
Breast augmentation procedures are generally performed using two types of filler material: silicone and saline solution. Every 100 cc of saline breast implant corresponds to 0.21 lbs. of volumetric weight, while every 100 cc of silicone implant is slightly heavier at 0.23 lbs.
Although the weight difference of similarly sized saline and silicone implants is negligible, patients with saline implants appear to have a bigger bust size compared to those with silicone implants. Instead of molding to the torso like a silicone implant, a saline breast implant sits atop the chest cavity, states Dr. Tom Pousti.