Is 375 Cc Equivalent to C or D Cup?

My breast size was 34b and I wanted somthing natural not big so I asked my surgeon for a C cup , my weight is 54.5 kg and my height is 159cm, I had 375cc 3 days ago they look huge!!! I don't think I will ever like them

Doctor Answers 17

#CC'sForCupChange depends

It is not a simple question to answer and here is why: It is very difficult to determine the exact size and shape implant you will require to best match your ideal breast image without an examination by a board certified plastic surgeon. Not just any board certified plastic surgeon, but one with many years of frequently performing breast augmentation surgery including different approaches, techniques and implant choices. This is because several measurements not to mention your breast characteristics are needed to determine the optimal implant size to obtain your goals. Without knowing these dimensions it would be difficult to make this determination. For example, the existing base width of your breast will determine, in many cases, the maximal volume per implant profile that you can accommodate. To illustrate; a 100 cc difference may make a significant difference with a narrow base width breast, but much less of a difference if you have a wide chest wall and wide breast “foot print”. Therefore, just because your friend may have a great result with let’s say a 375 cc implant to make her go from a “B” cup to a “C” cup size does not mean that you will have the same result with the same size implant. . Further simply placing implants in a bra to determine the size best for you is not always accurate as the bra often distorts the size, is dependent on the pressure the bra places plus the implant is outside your breast and not under it among other variables. Computer software morphing programs that automatically determine the best implant size can be helpful in some but not all cases (e.g. doesn’t work well in my experience with existing implants, sagging or asymmetric breasts). Using “want to be” photos however are useful if simply provided to the surgeon as I will further explain in the link below:

Orange County Plastic Surgeon
5.0 out of 5 stars 76 reviews

Is 375cc equivalent to C or D cup?

Hello! Thank you for your question. In general, implant size does not correlate with bra cup size. The cup size itself will vary from manufacturer to manufacturer as well as who is doing the actual measurements. Thus, cup size is never a reliable indicator for your breast size. I typically encourage my patients not to communicate her desires in cup size but more on the actual look and appearance.

Good communication between you and your surgeon of your expectations is warranted - choosing your surgeon wisely is the first step. Discussion of your wishes and having an honest and open dialog of your procedure is mandatory (e.g, implant type, incision, placement, lift, etc). I have found that photographs brought by the patient is helpful to get a visualization of the appearance you wish for in terms of size, shape, fullness, etc. In addition, your surgeon's pre and postoperative photographs should demonstrate a realistic goal for you. Once this has been accomplished, allow your surgeon to utilize his/her best medical judgment during the procedure to finesse the best possible result for you after preoperative biodimensional planning and fitting the right implant for your breast width.

Hope me that this helps! Best wishes for a wonderful result!

Lewis Albert Andres, MD
Scottsdale Plastic Surgeon
5.0 out of 5 stars 14 reviews


There is no way to guarantee a particular bra size. Bra sizing varies greatly between bra manufacturers and a C in one bra will be a D in another. What matters more than the assigned bra size is the way the implant looks on you. The best option for your body and aesthetic goals can be determined in a thorough implant sizing session.

Implant sizing depends on several factors. One of the most important factors is your breast width. Generally, your surgeon will measure your breast width, and then provide you with a range of implant sizes appropriate for your native breast size. There are more nuances to it than just what I've described, but this approach works for most women.

I usually have my patients bring in a large bra and a tight t-shirt to do sizing. I'll then choose 3-4 implants that I feel are appropriate, and have my patients place them in the bra under the tight t-shirt. My patients can then look in the mirror and get a good sense of what they will look like with the provided implant sizes. My patients like this approach and get a great idea of how they will look.

By using this technique, your surgeon can outline a range of appropriate implant sizes that will be aesthetically pleasing, and you make the final decision.

I hope this helps. Good luck!


Asif Pirani, MD, FRCS(C)
Toronto Plastic Surgeon
5.0 out of 5 stars 33 reviews

Implant Selection Process

In order to make an accurate size recommendation, I would need to assess your chest wall and breast mound measurements and characteristics.  Unfortunately, there is not a general rule of thumb or objective criteria to implant selection.
Your plastic surgeon will perform several measurements of your chest wall and breast anatomy and determine a range of implants that both fit your chest wall and reach your desired goals.
The next step is to try on this range of implants in the office with your doctor.   The key to this success is showing your surgeon the body proportion you desire with a bra sizer and allowing your surgeon to guide you to the right implant.   It will be much easier to communicate in implant cc's than cup size when determining the appropriate implant for you.
I wish you a safe recovery and fantastic result.
Dr. Gill

Paul S. Gill, MD
Houston Plastic Surgeon
5.0 out of 5 stars 65 reviews

Implant size and cup size.

You are likely swollen from your surgery  It can take several weeks for the swelling to resolve.  Please followup with your PS as scheduled.

Questions about implant size after surgery

You are still too early to judge the result of your breast augmentation.  I do not promise a patient a cup size because this is a ticket to disappointment.  It is best to look for a shape or contour that you like.  In our office we use the Vectra 3D imaging system.  This allows the patient to visualize their result prior to surgery.  In one year of use and over 100 breast augmentations I have had no patient complain of an implant size problem.  

Jeffrey Zwiren, MD
Atlanta Plastic Surgeon
4.5 out of 5 stars 13 reviews


Three days after surgery is much too early to be coming to any conclusions about size. Please give youself more time to heal

Norman Bakshandeh, MD, FACS
New York Plastic Surgeon
5.0 out of 5 stars 14 reviews

Is 375 Cc Equivalent to C or D Cup?

There is no answer to this question. Cup sizes are not uniformly defined and accepted. Many women have three different cup sizes in their bra drawer all of which may fit. 

A 375 cc implant will not result in the same size breast in patients whose natural breast tissue is of different volume and/or shape.

At three days it is quite early to judge size. Implants are often high riding, and seem to bulge at the top and look larger than they will after they settle into position. 


Thanks for your question, best wishes. 

We can't predict cup size based on the implant size alone

This is a very common question that is confusing to most patients.  The same implant will give a different cup size to different patients due to many factors.  The size of the patient, the amount of preexisting breast tissue, drooping of thre breasts and the way cup size is measured will all influence the final cup size that a patient gets after surgery.

It is very early after your surgery and you are likely swollen.  375cc is not a large size.  Please give yourself more time before you make and decisions about the size of your breasts.

Shim Ching, MD
Honolulu Plastic Surgeon
4.5 out of 5 stars 22 reviews

375cc + no breast equals B cup. 375cc adds about 1 1/2 cups to whatever you start with!

Cup sizes are so variable (yet so universally used) that we must first decide if your 34B cup breast size was on the "small" side of B or on the "big" side of B, and if your request for a C cup was for a "full C cup" (which often is best fit by a D-size bra from Victoria's Secret), a "small C cup" or something in between.

Did you really want to go up only a "little bit" in size so "no one would notice," and did you know that small implants would not have fit your breast base diameter and could have ended up giving you a wide cleavage or implants that moved around excessively in a proper-sized pocket? These are all things that only the surgeon who consulted with you and listened to your goals, examined your anatomy, and determined how to best achieve your desired appearance could explain. As you now know, it's not just choosing a couple of implants and "popping them in." It does take a bit of skill, experience, and surgical expertise to do this "right."

As a general rule, I have found that it takes about 250cc to equal about 1 cup size, so adding 375cc should add 1 1/2 cup sizes to whatever breast size you started with. Even my 250cc "rule" is indistinct; many of my esteemed and experienced colleagues feel that smaller volumes (150cc to 225cc if you read other answers here on RealSelf) are "equivalent" to about one cup size. Thus, if someone who uses a 150cc-1 cup size "rule" answers your question, you would have added 2 cup sizes to whatever breast volume you started with.

At 5'2" and 119 lbs. you are definitely petite, and 375cc implants are not at all unusual for implant choices for many women your size. Of course, what breast volume each individual patient brings to the table is critical to the final result in terms of size, and that takes us back to what 34B really looks like in terms of your exact anatomy, and what your goal was in terms of what a "C cup" means in your mind's eye.

This is why I believe sizing with implants in a bra and stretchy top is helpful (though even this can be confusing since I have also found over 27 years and thousands of breast augmentation patients that I must add 50-100cc to whatever implant size a patient chooses in a bra in order to achieve that "look" when under a patient's muscle).

Photographs of desired goal breast sizes also help me visualize what individual patients are seeking, and final implant size is chosen in the operating room when I have all of this information as well as the tightness of each patient's muscle, skin, and own breast tissue. Having ALL implant sizes and profiles available to choose from in our surgical facility is another critical factor in allowing proper size selection--it's a pretty big bummer to have to tell a patient that the size I found out would have been best was not among the 3 sizes that were pre-ordered. This happens in all too many plastic surgeon's practices, and leads to "wrong size" choice in too many patients, IMHO.

3 days post-op is much too early to be concerned about being "too large." While this may still be true even when things soften, settle, and drop into position, I suspect that you will not feel the same way you do now when your breasts are "high, tight, and swollen." Smaller implants have smaller diameters, and ending up with "perfect" size breasts with wide cleavage could end up being a different sort of unsatisfactory! So for now, be patient and see how things end up after 3-6 months. Even in 3 weeks things will be substantially better! Nobody can guarantee or reassure that you will be happy, but adding 1 1/2 cups to what you  started with doesn't sound too far off base, if at all!

Be patient with your healing and your surgeon! Please let us know how you feel in a few weeks (or months), but more importantly, keep a good dialogue going with your surgeon, who really does want you to be happy! Best wishes, and Happy New Year! Dr. Tholen

Richard H. Tholen, MD, FACS
Minneapolis Plastic Surgeon
5.0 out of 5 stars 196 reviews

These answers are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.