Is There Much a of a Difference Between 320 Cc and 345 Cc

More important is the profile of the implant and placement.  There is very little difference between a 320 and 345cc implant.  Sizers are also frequently not like the implant.  You should know if the sizers are the same profile which will be used on you.  Regardless the difference is not likely to be noticeable.

The difference is very minor, especially if you have a larger frame. Trust what your surgeon says and rely on what you think is the best choice.

There's not much difference between 320 and 345. However, just to let you know that one of the biggest regrets from patients after they've had surgery (aside from saying that they'd wished they had done it sooner) is that they wished that they had gone bigger.

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. Given
your desires, a breast augmentation, with an implant or fat grafting,
would be an ideal procedure that would meet your expectations. Breast
augmentation is now the most popular procedure performed in plastic
surgery today. One tolerated very well by women with minimal downtime
and high patient satisfaction. 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, etc). Your height,
weight, breast width, and body habitus will make a difference for which
implant style/projection to choose. Implant
profile will also make a difference on the projection, which will
influence overall breast/cup size. 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 of results.
Sizers are helpful during an in-office consultation. 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. This is the most important determinant
for the sizing of implants, which will provide the optimal result and
most aesthetically-pleasing result for you.Consult with a
board-certified plastic surgeon well-versed in breast procedures who
will examine and discuss with you the various options and factors to
consider and help you decide which one will be the right one for you.
Hope me that this helps! Best wishes for a wonderful result!

In our Jacksonville breast augmentation practice, we routinely perform breast augmentation revision surgery on women who wish they had gone bigger. 25 cc will not make much of a difference to your overall result. Remember the implant will look smaller inside the body.

What your surgeon meant is that the "appearance" of your breasts will shrink by about 10% compared to sizing in a bra. Of course, your implants are cohesive silicone and cannot leak or rupture (and will NOT shrink). The surgical swelling in and around your breasts will go down, and your skin and own breast tissue will soften and stretch somewhat, giving ALL patients a different look than when sizing. Your surgeon is also referring to the fact that implants choices made pre-operatively in a brassiere will ALWAYS look smaller in your body, which is why I tell my patients that I will add 50-100cc to their sizing choice to most closely achieve the "look" they chose in a bra.

I have found out (the hard way) that if a patient chooses 300cc implants, for example, and I put in those exact 300cc implants, most patients feel that I put in the "wrong ones" (too small). After a few re-operations, I learned that whatever they chose needed to be increased by 50-100cc to most closely approximate their wishes.

You are right, you cannot even "see" a 25cc difference; that takes at least 60-100cc. You should roughly figure about 250cc per cup size, so you see why 60cc (less than 1/4th cup) is not even visible. Even 100cc is still less than a half cup size difference. If you like the 345cc sizers, your surgeon should use 400-425cc implants to achieve your goals. Honest!

And NO, you won't be "too big." Read the link below for more information, or my article (found on my "about" tab on this site) "What is the Right Breast Implant Size for You?"

25 cc of difference in size is very little, about the size of two shot glasses and when spread over the entire breast will essentially be unnoticed.  In general, patients wish they had gone a little bigger in inplant size than they chose preoperatively.  All women and men have body assymetries and you may need a bigger implant under the smaller breast in order to achieve better symmetry. If you are really undecided, visit one more time with your plastic surgeon so that everyone is on the same page.

Thank you for the question.  25 cc difference would not be that noticeable of a difference.  best to relay to your desired end result specifically with your board-certified plastic surgeon. Best of luck. Dr. Michael Omidi.


An in-person exam with a board-certified plastic
surgeon is the best way to assess your needs and provide true medical advice.

I consider two factors when selecting implants for my patients:1.Dimensional planning2.Gel Implant Sizing systemDimensional planning – The measurements of your chest wall are taken. Also, the breast dimensions including the height, width, and current dimensions of each breast form the basis of dimensional planning. Based on these measurements, the implant size is recommended. This will give you a unique breast implant that is suited for your body frame. However, there are some limitations of what size we can recommend. For instance, some implants may just be too big for a narrow chest wall. Your surgeon can review this with you during the consultation.Gel Implant Sizing system – During the preliminary breast implant consultation, you will be provided with an option to “try on” a variety of implant shapes and sizes. You can also visualize the possible outcomes of your surgery which helps you to get that perfect size to give you the shape that you longed for. This way your preferences are known and you can then pick a range of implants that will “fit” just right to give a soft natural fuller look. Hope this helps.Best wishes,Dr. Basu

This small a difference will be hard to tell under the muscle.  I would choose the 345cc.  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