Not a number of cc, but the size your body can carry

Three values make up an implant's size: volume (cc), diameter and height. Search results almost only ever mention cc, so how much the other two shape the result stays largely unknown. For reference, volume is usually described as small at 150~200cc, medium at 300~350cc and large above 400cc. But that is a name for volume, not a name for shape.

Diameter is not something you pick; your chest sets it. It is generally kept slightly narrower than the width the breast sits on. Height means how far the implant projects forward. And when volume is fixed, those two push against each other: as height goes up the diameter narrows, and as height comes down the diameter widens.

So at the same 300cc, a narrow tall implant and a wide low one build entirely different breasts. The first reads as projection forward; the second spreads sideways and reads as fullness. If you arrive at consultation having fixed only the cc, you pass through without ever learning this choice was still open.

One clinic says up to 300cc is possible; another says 275cc is the maximum. We are often asked which is right, and usually both are. There is one value the two assessed differently: the thickness and elasticity of the existing breast tissue.

Chest measurements are read off a tape, so they do not vary much between clinics. How far the tissue can stretch, on the other hand, is not read off a scale. It is judged by hand, and that judgement takes accumulated operating experience. Even on a broad chest, tight tissue can be stretched past its limit by a large implant and lose its elasticity. There is no rule that a larger chest requires a larger implant.

So if you heard two different numbers, neither side lied; their reading of your tissue differed. What to check is not the number but its reasoning. Ask why that ceiling was set and what specifically is a concern above it. The depth of the judgement shows itself in the answer.

First, a common confusion. A teardrop-shaped breast and a teardrop implant are different things. The former describes a finished silhouette that falls away like a drop of water; the latter is an implant built to be gentle at the top with the volume loaded low. Wanting the shape does not require the implant.

Compared as implants: the teardrop is gentle above with volume below, while the round is an even semicircle top and bottom. In theory the teardrop is said to build a more natural line, but because it has to hold its form, it tends to feel somewhat firmer than a round implant.

The more important difference is orientation. A round implant has no top or bottom, so a slight rotation inside does not show. A teardrop has a fixed direction, which adds a condition: that direction and position must be maintained. This is why it is considered the harder implant to handle. On top of that, the class of implants given a textured surface to hold their form has fallen sharply out of use worldwide over safety concerns, and we no longer recommend teardrop implants.

Does that make round implants unnatural? No. Today's round implants move with gravity inside the body: lying down they spread naturally, standing up the volume gathers low and falls into a silhouette close to a teardrop. Ultimately a natural line comes from dozens of anatomical factors acting together — the structure of the chest, the amount of breast tissue, the thickness of the skin, the plane the implant sits in. That is why the same implant looks natural on one person and not on another.

Not everyone searching for size wants to go bigger. Some come to this page because their breasts are large enough that the shoulders and neck ache, sweat collects in the inframammary fold and eczema keeps returning, and choosing clothes is difficult every time. Information about augmentation is everywhere while information about reduction is almost nowhere, which is its own frustration.

When weight pulls forward, the shoulders roll in and the curve of the neck flattens. Reducing the size so the centre of gravity returns to where it belongs can ease that load. But the same caution applies here: we do not recommend an unreasonable amount. Taking too much can cause problems at the nipple and makes the scar more visible. Only the direction is reversed; the principle of staying inside what the body can carry is the same.

One more thing worth knowing. Even after a reduction, the remaining breast tissue contains fat, so it grows again if you gain weight and shrinks further if you lose it. If a large change in weight is on the horizon, it helps to say so at consultation. Whether you are enlarging or reducing, size is not a number fixed on the day of surgery but a value that travels with the body you will have.