Deciding on breast implant sizes is not as simple as picking a bra cup and expecting a predictable outcome. Implant volumes are measured in cubic centimetres, while bra sizes vary widely between manufacturers and even between styles. For this reason, the final result depends on more than just the numbers. 

Understanding Breast Implant Sizes

Breast implants are not measured in cup sizes but in volume, expressed in cubic centimetres. A smaller breast implant can be around 150 cc to 200 cc, while a larger implant may exceed 400 cc. 

Beyond volume, implant diameter and profile both influence the final appearance. 

• Diameter refers to the width of the implant’s base, which needs to suit the patient’s chest. 
• Profile describes how far the implant projects forward, ranging from low to ultra-high. 

Two implants with the same volume can look very different depending on their diameter and profile. Because of these variables, breast implant sizes are best considered as part of an overall assessment rather than a target cup size. An increase of 150 to 200 cc may raise a bra size by one cup, but this varies according to each individual’s frame and proportions.

Considering Small Breast Implants

Small breast implants are often chosen by women who want a subtle change while preserving their natural shape. They are commonly between 150 cc and 300 cc. For patients with a petite frame or narrow chest, small breast implants can create balance without overwhelming proportions.

Advantages of Small Breast Implants

There are also practical advantages. Smaller implants usually require smaller incisions, which can limit scarring. They place less strain on breast tissue and skin, which may reduce the chance of sagging over time. Recovery can also feel more manageable since less weight is introduced to the chest area.

Disadvantages of Small Breast Implants

However, patients should also be aware that small breast implants may not provide the level of change some expect. When a more noticeable increase in projection or volume is desired, larger implants may need to be considered.

Considering Large Breast Implants

Large breast implants typically refer to implants over 400 cc. These can provide greater projection and a fuller shape, which may suit taller or broader women. Larger implants can reshape the breast profile more significantly and are sometimes preferred when a patient wishes for a more noticeable enhancement. 

At the same time, larger breast implants come with trade-offs. The additional weight can place pressure on breast tissue, leading to possible sagging that might later require a breast lift (mastopexy). 

Daily activities and exercise may feel more restricted, and some women report back or shoulder discomfort due to the extra weight. Choosing large breast implants is therefore not only a cosmetic decision but also a practical one that must take into account future wellbeing.

Other Factors That Influence Breast Implant Decisions

Breast implant sizes are only one part of the overall picture. Dr Terrence Scamp (MED0001157212) | Specialist Plastic Surgeon considers many other factors carefully when assessing suitability for breast augmentation (mammaplasty).

Anatomy, Age, and Lifestyle

A woman’s body proportions, existing breast tissue, and chest width all affect the choice. Age and skin elasticity also play a role, since firmer skin adapts more easily to change. Patients with reduced elasticity may need combined procedures such as a breast lift (mastopexy) to achieve the desired result.

Lifestyle also plays a role. Women who engage in regular physical activity, particularly high-impact sports, may find that larger implants interfere with comfort. 

Incision Approaches

Another factor that influences outcomes is where the incision is made. 

• The inframammary fold incision is placed in the crease under the breast, where it can usually be hidden by the natural fold. 
• The periareolar incision is made around the edge of the areola, often blending with the colour change between skin and areola. 
• The transaxillary incision is made through the armpit, which avoids scarring on the breast itself but requires more specialised surgical technique. 

Each method has different considerations in terms of visibility, healing, and access for implant placement.

Implant Placement Options

Placement refers to where the breast implant sits in relation to the breast tissue and chest muscle. 

• Subglandular placement positions the implant behind the breast tissue but above the chest muscle. 
• Submuscular placement puts the implant beneath the chest muscle, which may provide more coverage for women with little natural breast tissue. 
• The dual plane technique combines both, with the upper part of the implant beneath the muscle and the lower part beneath the breast tissue. 

Placement choice is influenced by anatomy, tissue quality, and desired outcome.

Long-Term Considerations

Breast implants are not lifetime devices. Most require replacement after 10 to 15 years, although some may last longer or shorter, depending on individual factors. 

Over time, the body changes, and implants may shift or require adjustment. Patients should be prepared for the possibility of future surgery, whether for replacement, adjustment, or removal.

Making an Informed Choice

There is no single answer to choosing breast implant sizes. What works well for one person may not be suitable for another. Careful measurement and assessment help match the implant to the individual’s body frame.

Dr Terrence Scamp (MED0001157212) | Specialist Plastic Surgeon uses 3D Vectra imaging technology to demonstrate possible results. These approaches help patients visualise changes before making a decision. 

Long-term satisfaction is also important. Trends in breast shape and size may shift, but implants remain for many years, so patients are encouraged to think beyond immediate expectations.