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Dr Jérémy Djian, 5 Square Thiers , 75016
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What size breast implant should you choose? A comprehensive guide to achieving natural and harmonious results

published on 19.08.2025 by Dr. Djian
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Summary
  • BUT WHAT EXACTLY DOES THE «SIZE» OF A BREAST PROSTHESIS MEAN?
  • WHAT POINTS SHOULD I BEAR IN MIND WHEN CHOOSING A SIZE?
  • SIZE SELECTION METHODS
  • THE PSYCHOLOGY OF VOLUME: WHAT YOUR CHOICE SAYS ABOUT YOU
  • CONCLUSION: CHOOSING THE RIGHT SIZE IS A TWO-DIMENSIONAL DECISION
  • FREQUENTLY ASKED QUESTIONS ABOUT BREAST FORM SIZING
  • HERE ARE SOME OTHER ARTICLES ABOUT BREAST IMPLANTS THAT YOU MIGHT LIKE TO READ
In short
  • The size of the’breast implant is not just a number in cc: the shape, the projection, the thoracic base, The softness of the fabrics and the expected look are just as important.
  • The same size can produce a considerable visual difference depending on morphology or the chest circumference initial.
  • A fitting simulation or a size/volume matching grid can help to determine size the most suitable.
  • For a natural, long-lasting effect, it is often preferable to opt for a moderate augmentation, a average profile or low, and which suits your daily rhythm or body constraints.
  • Dr Djian, plastic surgeon in Paris, favors a customized approach and uses reference implants such as Motiva, recognized for their high-quality silicone gel.

Thebreast augmentation with implants is a surgical operation performed by Dr Djian in Paris, which can restore, embellish or restore increase volume of the chest. But beyond the operative gesture, determine size The ideal prosthesis remains the most strategic step. Several factors influencing such as morphology, thoracic proportion, aesthetic preferences, or even the’physical activity. It's not a matter of aiming for a cc number or a mathematical correspondence with a support bonnet, but from’achieve a result a harmonious, long-lasting end result. This comprehensive guide helps you to see things clearly, with concrete examples, clear explanatory charts and reliable medical information.

 

BUT WHAT EXACTLY DOES THE «SIZE» OF A BREAST PROSTHESIS MEAN?

 

Before aiming for a cap C or a large size, it's important to understand what size really means when it comes to breast prostheses. It's neither a simple measurement in cc, nor a universal equivalence with the support bonnet. It's the interaction between several anatomical and technical points.

 

DECIPHERING TECHNICAL TERMS

 

The size of’breast implant is defined by 4 main dimensions, which influence the final render as much as the volume of the breast prosthesis.

Breast implant size 4 criteria

 

  • Volume (in cc) expressed in cubic centimetres, it indicates the quantity of silicone gel or saline solution contained in the prosthesis.
  • Projection (or profile) This indicates the degree to which the prosthesis protrudes forward. There are generally 4 profiles: low, medium, moderate and high projection. A moderate projection is suitable for most patients who want a natural result without excess.
  • Diameter (or thoracic base): this is the width of the prosthesis, measured at its base. It must correspond to the natural width of the patient's rib cage. If the implant is too wide, it may protrude to the sides, causing discomfort under the arms, an unnatural appearance («overflowing prosthesis» effect) and upsetting the balance between breast and bust. Conversely, if the implant is too narrow, it may appear too constricted or pointed.
  • Height This is mainly for anatomical, drop-shaped prostheses. This is key to achieving a vertically proportioned result.

 

Example two 300 cc models can have a final result radically different if one is high profile (projecting more) and the other moderate (more discreet). So there's a real difference in perception, even at equivalent volumes.

 

DOES THE VOLUME IN CC CORRESPOND TO A CUP SIZE?

 

Many people think that a 300 cc implant always corresponds to a cap C, or that 500 cc will get you to an E cup. This simplistic equation is misleading. Visit volume of a breast prosthesis is not a single, reliable indicator of the expected result.

The final appearance depends on several factors that influence the perception of volume:

  • The chest circumference and the chest wall a thin person with a small thoracic base will see a more visible effect than a taller person with a wide base.
  • The mammary gland The more developed it is, the more moderate the difference made by the breast device.
  • The type of prosthesis, its shape and projection: a profile breast prosthesis tall or round will give a more pronounced curve than a low profile.

Estimated correspondence table between volume and cup size according to morphology :

Volume (cc) Fine morphology
(1m50 / 45-50 kg)
Medium morphology
(1m65 / 55-60 kg)
Wide morphology
(>1m75 / >65 kg)
250 Bonnet B Small B A to B
300 Small C Cups B to C Bonnet B
350 Bonnet C Bonnet C Cups B to C
400 Bonnet D Cup C to D Bonnet C
500 Bonnet E Bonnet D Cup C to D

 

This is an indicative visualization: implants are intended to modify the shape, projection and proportions of the breast, but the final result depends on several factors such as morphology, the type of implant chosen, its projection and the elasticity of the skin.

Key information to remember It's the overall balance of the bust that takes precedence over the simple square centimetre figure.

 

WHAT POINTS SHOULD I BEAR IN MIND WHEN CHOOSING A SIZE?

 

The choice of a breast implant is never based solely on a desire or a before-and-after photo. It's a multifactorial assessment, combining medical, aesthetic, functional and personal elements. To achieve a harmonious result and avoid breast augmentation missed, There are 3 key factors to consider, right from the initial consultation.

 

ANATOMICAL FACTORS

 

The patient's body characteristics play a decisive role in the choice of prostheses:

  • Width of breast base It must match the diameter of the prosthesis to avoid overflow or visible hollows. Precise matching is essential.
  • Skin elasticity Thin skin reveals implant contours more easily. It offers less room for significant augmentation without the risk of wrinkles or discomfort.
  • Chest circumference This influences the visual impact of the augmentation. On a small morphology, a moderate implant will appear more pronounced, whereas it will be more discreet on a large bust.
  • Fabric quality : A profile breast prosthesis on tissue that is too relaxed can generate a breast ptosis secondary.

Please note Motiva Ergonomix implants are often recommended for very thin patients. Their soft texture and supple gel are better suited to delicate skin.

 

AESTHETIC AND PERSONAL FACTORS

 

The visual aspect is often linked to individual preferences, to the way in which the patient projects herself in her future silhouette, but also to her social or professional environment.

  • Desired rendering Each patient has a different objective. It's helpful to show photos of expected results.
  • Lifestyle : Sportswomen or women who are very active on a daily basis should choose a medium size, adapted to a smaller body. physical activity regular.
  • Proportion with the rest of the body : The implant chosen must respect the visual harmony of the bust, in relation to the width of the shoulders, pelvis and waistline.

Example a patient wishing to increase her chest circumference while maintaining a natural shape can opt for a average profile, a diameter adapted to its thoracic base, and a progressive volume from 280 to 320 cc.

 

SURGICAL AND MEDICAL FACTORS

 

The surgeon's role is to identify the real possibilities based on technical constraints:

  • Tissue tension : A strong projection on a narrow bust can lead to hulling, pain or tissue stretching.
  • Risk of breast cancer The implant does not cause cancer, but it can make detection more difficult. Certain models, such as the macro-textured ones, have been restricted in the European Union.
  • Medical history An increase after breast cancer imposes strict criteria: symmetry, type of prosthesis, intermediate projection, sometimes combined reconstruction.
  • Installation drawing (in front of or behind the muscle): It modifies the appearance of the breasts, the sensation to the touch, and the durability of the result.

 

SIZE SELECTION METHODS

 

Before any surgical operation, several techniques can be used to determine size of the implants and visualize the final result expected. These tools help you make an informed decision, combining precise measurement, morphological estimation and realistic projection.

 

TRIALS WITH TEST PROSTHESES: ESSENTIAL SIMULATION

 

During the consultation, Dr Djian suggests a fitting with test prostheses, inserted in the bra.

This simulation process makes it possible to :

  • Compare several formats to identify the visual difference between two profiles (e.g. low vs. high).
  • Assess aesthetic impact according to chest circumference and the proportion of the bust.
  • Measure the level of comfort felt when wearing tight-fitting clothing.
  • Refine shape preferences: anatomical, round, etc.

Example between a 295cc moderate profile implant and a 310cc high profile, The difference is not always visible on the scale, but can be seen in the final look and impression of curvature.

 

USE OF PHOTOS, TABLES AND DIGITAL TOOLS

 

Some firms offer 3D simulation tools or correspondence matrices between :

  • Volume of breast prosthesis (in cc)
  • Expected cup size
  • Type and projection
  • Current and desired breast shape

These elements enable a structured assessment, particularly when it comes to’increase volume without excess, or to choose between several types of implants.

Board It's often more reliable to base your calculations on before/after images of patients with a similar morphology than on an isolated «ideal» image.

 

INTRAOPERATIVE ADJUSTMENT: THE FINAL CHECK

 

During the’surgical operation, Dr. Djian performs an intraoperative adaptation. This involves :

  • Test several formats before final installation,
  • Assess skin tension and volume distribution,
  • Correct any asymmetries.

This method increases the chances of’achieve a result based on a real-time assessment of the company's current chest wall, and natural rendering.

 

THE PSYCHOLOGY OF VOLUME: WHAT YOUR CHOICE SAYS ABOUT YOU

 

The choice of breast enlargement breast implant is not only based on anatomical elements. It also reflects deep-seated expectations, a quest for personal harmony, a desire for bodily satisfaction and a desire to align oneself with an often long-constructed self-image.

 

BODY IMAGE AND CULTURAL INFLUENCES

 

Many patients talk about models from social networks, French or European beauty standards, or personal complexes linked to a particular gender. little hat, a breast ptosis or a failed operation following a breast cancer.

Some women are strongly influenced by :

  • The symbolic value of generous breasts in certain cultures,
  • A desire to regain a feminine appearance after maternity or illness,
  • A “facelift” effect without the need for more invasive surgery.

 

SELF-CONFIDENCE, PHYSICAL ACTIVITY AND PERSONAL PROJECTION

 

Women often want something subtle that suits their personality. lifestyle assets or a demanding professional role (e.g. sportswomen, dancers). Others are looking for a more pronounced change, in line with a new phase in their personal journey (separation, new career, end of an old complex...).

The choice of implants also reflects a personal intention: to regain confidence, reappropriate one's body or mark a turning point in one's life. It's not just a question of aesthetics, but of alignment between self-image, deep-seated aspirations and lifestyle.

 

HOW TO MAKE A SINCERE, UNINFLUENCED CHOICE?

 

Here are some concrete tips to help you make a more aligned choice:

  • Asking the right question Do I want to “reach” an ideal, or “blossom” in my current body?
  • Use photographs of former patients close to your own morphotype, not unrealistic models.
  • Talking to your plastic surgeon the possibility of adjustment, the right shape and the natural result in moderate projection.
  • Get several medical opinions if necessary, to compare recommendations and refine its thinking.
  • Request a correspondence grid or test several dimensions of prostheses during fitting.

 

10 COMMON MISTAKES WHEN CHOOSING AN IMPLANT SIZE

 

Below you'll find our infographic on 10 common mistakes when it comes to select size of her future breasts.

10 mistakes when cutting implants

10 common mistakes when choosing a breast implant size

 

CONCLUSION: CHOOSING THE RIGHT SIZE IS A TWO-DIMENSIONAL DECISION

 

Choosing the right breast implant is more than just a matter of cubic centimetres. It's based on an overall vision that combines :

  • objective parameters : thorax width, skin elasticity, suitable projection, mammary gland existing,
  • personal expectations The design is based on the following criteria: the desired visual effect, discretion or volume, and the overall balance of the bust.

The right size is the one that :

  • respects the original structure,
  • adapts to your daily life and body habits,
  • fits naturally into your silhouette,
  • offers lasting comfort, without compromising your mobility or self-image.

A poorly chosen prosthesis can lead to premature ptosis, discomfort or a disappointing appearance. Hence the importance of making the right choices at the first consultation.

Dr. Djian, plastic surgeon in Paris, is committed to building a customized project. Thanks to his expertise and a keen ear for your expectations, he offers support based on balance, precision and coherence between your body and your self-image.

A good result isn't just measured in terms of image: it's experienced on a daily basis, in the freedom of movement, the pleasure of getting dressed, and the precision felt in front of the mirror.

 

FREQUENTLY ASKED QUESTIONS ABOUT BREAST FORM SIZING

 

Questions about implants are among the most common during the pre-operative appointment. Some are practical concerns, others social comparisons, or fears about the expected outcome.

 

CAN YOU GO FROM AN A-CUP TO A D-CUP DIRECTLY?

 

Yes, but not without conditions. Such a bonnet increase depends on the’skin elasticity, the flexibility of the mammary gland. If the amount of projection or the size of the prosthesis is too great at one time, a breast lift or a prosthesis may be necessary. surgical operation may be necessary.

 

IS THERE A RISK OF REGRETTING A PROSTHESIS THAT IS TOO SMALL OR TOO LARGE?

 

Yes, this often happens, especially when the decision has been taken without hindsight or a concrete visual overview.

  • Format too minimal A feeling of “it's all for nothing”, disappointment at a change deemed insufficient, the desire to undergo further surgery to achieve a more pronounced effect.
  • Too large a format : discomfort in daily life, difficulty dressing, physical appearance out of step with the lifestyle, particularly in the case of’physical activity intense.

In both situations, it's essential to clearly define your aesthetic preferences with your surgeon, using trials, comparisons or personalized projections.

 

SHOULD DENTURES BE REPLACED EVERY 10 YEARS?

 

No, that's a common misconception. Modern implants, such as those from Motiva, are far more durable than older models.

As long as the breast prosthesis remains intact, without rupture or complication, and you are satisfied with the result, no replacement is necessary.

Find out more about life expectancy of prostheses see our dedicated article.

 

IS IT POSSIBLE TO BREASTFEED AFTER BREAST AUGMENTATION?

 

In most cases, yes. However, it is essential to :

  • give preference to the submammary route,
  • avoid an incision close to the areola,
  • inform her surgeon if a maternity project is envisaged in the short term.

 

WHAT IS THE MOST COMMON PROSTHESIS SIZE IN FRANCE?

 

The most popular models are between 280 and 350 cc, This generally corresponds to a full B or C cup, depending on morphology. Larger implants are rarer and often reserved for very specific requests.

 

CAN BREAST IMPLANTS BE PERMANENTLY REMOVED?

 

Yes, it is possible to remove breast implants permanently. during explantation. After removal, some patients opt for breast reconstruction (by lipofilling, for example), while others prefer to leave their breasts natural.

 

HOW DOES THE SIZE OF BREAST IMPLANTS AFFECT THE RESULTS OF MAMMOGRAMS AND OTHER SCREENING TESTS?

 

Breast implants, especially large ones, can complicate the interpretation of mammograms by masking part of the breast tissue. It is crucial to inform the radiologist of the presence of implants, so that he or she can use appropriate imaging techniques for effective screening.

 

HERE ARE SOME OTHER ARTICLES ABOUT BREAST IMPLANTS THAT YOU MIGHT LIKE TO READ

 

 

 

 

Your Questions

FREQUENTLY ASKED QUESTIONS ABOUT BREAST FORM SIZING

CAN YOU GO FROM AN A-CUP TO A D-CUP DIRECTLY?

more less

Yes, but not without conditions. Such a bonnet increase depends on the’skin elasticity, the flexibility of the mammary gland. If the amount of projection or the size of the prosthesis is too great at one time, a breast lift or a prosthesis may be necessary. surgical operation may be necessary.

IS THERE A RISK OF REGRETTING A PROSTHESIS THAT IS TOO SMALL OR TOO LARGE?

more less

Yes, this often happens, especially when the decision has been taken without hindsight or a concrete visual overview.

  • Format too minimal A feeling of “it's all for naught”, disappointment at a change deemed insufficient, the desire to undergo further surgery to achieve a more pronounced effect.
  • Too large a format : discomfort in daily life, difficulty dressing, physical appearance out of step with the lifestyle, particularly in the case of’physical activity intense.

In both situations, it's essential to clearly define your aesthetic preferences with your surgeon, using trials, comparisons or personalized projections.

SHOULD DENTURES BE REPLACED EVERY 10 YEARS?

more less

No, that's a common misconception. Modern implants, such as those from Motiva, are far more durable than older models.

As long as the breast prosthesis remains intact, without rupture or complication, and you are satisfied with the result, no replacement is necessary.

Find out more about life expectancy of prostheses see our dedicated article.

IS IT POSSIBLE TO BREASTFEED AFTER BREAST AUGMENTATION?

more less

In most cases, yes. However, it is essential to :

  • give preference to the submammary route,
  • avoid an incision close to the areola,
  • inform her surgeon if a maternity project is envisaged in the short term.

WHAT IS THE MOST COMMON PROSTHESIS SIZE IN FRANCE?

more less

The most popular models are between 280 and 350 cc, This generally corresponds to a full B or C cup, depending on morphology. Larger implants are rarer and often reserved for very specific requests.

CAN BREAST IMPLANTS BE PERMANENTLY REMOVED?

more less

Yes, it is possible to remove breast implants permanently. during explantation. After removal, some patients opt for breast reconstruction (by lipofilling, for example), while others prefer to leave their breasts natural.

HOW DOES THE SIZE OF BREAST IMPLANTS AFFECT THE RESULTS OF MAMMOGRAMS AND OTHER SCREENING TESTS?

more less

Breast implants, especially large ones, can complicate the interpretation of mammograms by masking part of the breast tissue. It is crucial to inform the radiologist of the presence of implants, so that he or she can use appropriate imaging techniques for effective screening.

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Dr. Jérémy Djian
Dr. Jérémy Djian

Dr Jérémy Djian is a plastic surgeon based at 5 square Thiers, near the Victor Hugo roundabout, in the 16th arrondissement of Paris.

He trained in Paris and remains attached to the hospital in the prestigious department of Pr Laurent Lantieri.

 

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TO DR. DJIAN
Pageot
August 30, 2022

Hello it would be to have a breast augmentation I have always had small breasts I would like larger breasts but not too much I wanted to know your rates thank you in advance

answer
Dr Djian

Hello, ma'am,
Prices for breast augmentation can be found on the Prices page.
Sincerely