While it is widely known that breast implants come in different sizes and fills (saline or silicone), it is lesser-known that implants may be round as well as shaped.
There Are Two Basic Implant Shapes: Round and Teardrop
Round Breast Implants:
As the name suggests, round implants are circular in shape and are not considered anatomic. They tend to have a half-moon shaped profile and come in a full range of sizes and widths. Round implants come in different projections (the amount that a round implant “sticks out”) ranging from moderate (the flattest), moderate plus, or high profile (has the greatest amount of projection). Round implants are available in both saline and silicone.
Shaped Breast Implants:
Shaped implants are considered to be more anatomic because, like a teardrop, they are fuller at the bottom and taper upwards to a narrow tip. Generally taller than they are wide, shaped implants are available in different height to width ratios. This design gives more projection in the lower part of the implant compared to the upper portion. To best maintain the shape, shaped implants are made of a more cohesive silicone.