Should I choose 375cc or 400cc? Concerned about them dropping and getting smaller when the swelling does down.

The difference between 375 and 400cc is 1 1/2 tablespoons, probably not even worth a discussion longer than 3 seconds with your surgeon.  Be sure to discuss your goals and concerns with your board certified plastic surgeon and consider the pros and the cons. Be certain your surgeon is properly certified.  I've attached a link where you can start your search. 

25 cc is not a very significant amount.  If you are already concerned that you may be choosing too small, it is likely that you will wish you went bigger.  Discussed this with your surgeon and I am sure they will be fine with the adjustment, provided your soft tissue can handle it.Best of luck!
Dr. SubbioBoard-Certified Plastic SurgeonNewtown Square/Philadelphia, PA

Increasing your implant size by 25cc's is not a big deal. It's less than 2 tablespoons in volume. So, I doubt your surgeon would mind the change. I would inform the office as soon as possible, so they will have plenty of time to order and ship the implants. Good luck!

Thank you for your question. It is difficult to make a recommendation about size of implants without a proper consultation. Many board
certified plastic surgeons offer technology that can do 3D simulation
breast imaging so patients can view outcomes not only related to their
breasts, but to the entire body as well. I recommend discussing these
options with your board certified plastic surgeon, who can assist you further.

Hello and thank you for your question.  The
best advice you can receive is from an in-person consultation.  The difference between 375 and 400cc is very difficult to detect after it has been placed.  The size, profile, and shape of
the implant is based on your desired breast size/shape, your chest wall
measurements, and soft tissue quality.  This decision should
be based on a detailed discussion with equal input from both you
and your surgeon.  
Best wishes and good luck.
Richard G. Reish, M.D.
Harvard-trained plastic surgeon

It is very difficult to determine the best lift you will need (recommended based on your photos) or 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 300 cc implant to make her go from a “A” cup to a “C” cup size does not mean that you will have the same result with the same size implant. The same process goes for just filling in the upper part of your breast without becoming much larger. 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 including silicone vs saline implant
#toobig #breastimplant

The difference between 375cc and 400cc is not significant, but talk with your plastic surgeon about your measurements and your breast anatomy to make sure that a 400cc implant would be right for you.  You want to make sure that your implants will give you as much of the look you like while still being safe and giving you a long term amazing result without stretching your tissues too much.   I'm sure if your surgeon thought 375cc would be good, he or she would be happy to talk to you about increasing a little bit to 400cc.  Best of luck!

Regardless of size all patients will say that they could have gone bigger. What you do not want to say is that you SHOULD have gone bigger.25 cc difference physically is almost negligible considering the total volume BUT psychologically you will be able to say to yourself, even though I still could have gone bigger, I really did go bigger.Do 400

Thank you for the question.  Ultimately, careful selection of plastic surgeon and careful communication of your goals (in my practice I prefer the use of goal pictures, direct examination/communication in front of a full-length mirror, in bra sizers, and computer imaging)  as well as careful measurements (dimensional planning) will be critical.
 
***Given your concerns, it is definitely worth spending more time (preferably prior to the date of surgery) with your plastic surgeon to discuss further.  One question that might be helpful to you: will you be more disappointed if you are slightly too small or slightly too big?  It will be important for many reasons, that you feel comfortable that you and your plastic surgeon are on the "same page" prior to proceeding.
 Generally speaking, the best online advice I can give to ladies who are considering breast augmentation surgery ( regarding breast implant size/profile selection) is:
1. Concentrate on choosing your plastic surgeon carefully. Concentrate on appropriate training, certification, and the ability of the plastic surgeon to achieve the results you are looking for. Ask to see lots of examples of his/her work.
2. Have a full discussion and communication regarding your desired goals with your plastic surgeon. This communication will be critical in determining breast implant size/type/profile will most likely help achieve your goals. 
In my practice, the use of photographs of “goal” pictures (and breasts that are too big or too small) is very helpful. For example, I have found that the use of words such as “natural” or "C or D cup" etc means different things to different people and therefore prove unhelpful.
Also, as you know, cup size varies depending on him who makes the bra; therefore, discussing desired cup size may also be inaccurate. Again, the use of computer imaging has been very helpful during the communication process, in our practice.
3. Once you feel you have communicated your goals clearly, allow your plastic surgeon to use his/her years of experience/judgment to choose the breast implant size/profile that will best meet your goals. Again, in my practice, this decision is usually made during surgery, after the use of temporary intraoperative sizers.
I hope this (and the attached link, dedicated to breast augmentation surgery concerns) helps. Best wishes for an outcome that you will be very pleased with.

25 cc's is not a huge difference and you probably will not notice it.  You can perform a baggy test to see what you think.