I’m 5’3 and is 550cc high profile silicone implants too big? (photo)

Great question!  Choosing an implant size can be tricky, as long as you're dealing with a board certified plastic surgeon you should be okay.  If the diameter truly matches the diameter of your chest, then it would be fine.  "Too big" is a subjective term, and everyone opinion could be different.  You should be able to see and feel a size similar to this in the office or at least try on the size in a bra to give you a good idea of what the potential results can me.  Best of luck and hope this information helps!
- Dr. Roger Tsai  @DrRogerTsai
Board Certified Plastic Surgeon

An ABPS board certified plastic surgeon will be able to guide you to the correct size implant for your measurements and desires.  Measurements of the chest wall and breast imprint width as well as knowledge of all breast implant sizes and profiles should make this process easy. Try on a profile bra with 450 cc silicone moderate plus sizers under a tailored blouse, tight sweater, swimsuit, workout clothes, and other garments you typically wear so that you have the best idea of whether the garments fit as desired with the implant selected. Then compare how you look and feel with the 550 cc silicone high profile sizers.
I would recommend that you go with the size that boosts your self-esteem, and fits your anatomy.  Choosing an implant based on an aesthetic goal that exceeds your anatomic capacity may lead to complications and possibly revision. Based upon his/her credentials, trust your surgeon to make the best decision in the OR when the implants are placed.
Kenneth Hughes, MD, ABPS Board Certified Plastic Surgeon
Los Angeles, CA

Patients often think in terms of cup size when considering augmentation. Unfortunately, devices are sized in terms of milliliters (cc) of volume. This can lead to some confusion when sizing. Additionally, it is important to remember that cup size itself is not standardized with variations from one manufacturer to another. Unfortunately, as many women can attest their cup size in an industry leader such as VS is not necessarily transferable to another brand.
Another point which is often under appreciated is that of anatomy and starting point. Any implant will add volume to the volume which is already present. The implant is additive. A particular volume will not necessarily confer the same cup size to different patients (often times it will not even confer the same cup size to different breasts in the same individual...remember they are "sisters" not "twins"). 
A general rule of thumb is that 125cc can represent somewhere between 1/2 to a full cup size increase. Smaller volume differentials (25-50cc) are typically less consequential representing a volume change of less than a shot glass. However, I have found these numbers, at least anecdotally, to be of little help. Patients often present with notions/goals which do not correlate with these sorts of sterile volumetric assessments.
When sizing patients, there are a number of useful tools including:
-3D imaging (has the added benefit of offering a volumetric analysis of the pre-operative breast)
-Breast sizers (rice bags)
-Goal photos
I also recommend that patients commit to a particular look rather than a cup size. Once a patient settles on a look that pleases them the overall cup size increase becomes less relevant.The key to obtaining a natural result is to stay within the parameters defined by your BWD. 
The question of too big is relative. What might be felt to be overly large on one patient may not elicit the same reaction from another. I would suggest more time discussing your options with your surgeon, as a switch in profile makes a more significant difference than simply greater volume. I will typically recommend patients decide on a profile before they commit to a size as this is a decision of "dramatic vs. subtle" and is more easily made than deciding between sterile numbers.
As always, discuss your concerns with a board certified plastic surgeon (ABPS).

Dear  newaugnewme,Breast implant type and sizing selection is a complicated process and requires a detailed consultation that includes a discussion of your goals, a detailed examination, and a lengthy discussion. But the decision will always start and end with the patient. When it comes to sizing, we have all of our patients find 3 photos of their desired breast size. We ask for naked breast photos because clothing can obscure the true size (push up bras). Next, we consult with patients and go over the photos and take detailed breast measurements during a physical exam. Next, we using a sizing algorithm to determine a range of implants that will work based on the exam and the measurements.Lastly, during the operation, we use silicone sizers in the operating room to see how the size actually looks in the breast. We sit the patient up in the operating room, while asleep of course, and compare the sizer result with their desired look photos. If it is too small, we start the process over with a slightly larger implant. We don't stop until we get the perfect match.Of all of my breast augmentation patients, every one of them has been happy with their size due to this detailed and meticulous process. You don't want to invest time and money into a result that is either too big or too small.You should discuss your concerns with a board-certified plastic surgeon and make sure that your surgeon understands your goals.Daniel Barrett, MD
Certified, American Board of Plastic Surgery
Member, American Society of Plastic Surgery
Member, American Society of Aesthetic Plastic Surgery

My best advice: more communication.
It is definitely worth spending more time (prior to the date of surgery) with your plastic surgeon to discuss further.  As you know, 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.
One question that might be helpful for you to consider: would you be more disappointed if you are slightly too big or slightly too small after the breast augmentation procedure?
Ultimately, 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.
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 "D or DD cup” or "too big" 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 helps. Best wishes for an outcome that you will be very pleased with. 

Hi, and thank you for the question

Based on the information and photos you sent us, you are a great candidate for a breast implant. This procedure could give you a excellent results. Its is good for you to know that the exact size can only be determined after careful measurement of your anatomical landmark. As you can understand studies and test are needed to see if you are clear for surgery but in general, if you seek the attention of a certified plastic surgeon, you should have a great result and a normal life. So feel free to contact us for further evaluation.   Thank you again and have a great day

Going to the operating room with a single set of implants has a higher risk of dissatisfaction. Many surgeons do intraoperative sizing to maximize patient satisfaction. The goal photos are studied, measurements are made, a selection  of implants are taken to the OR and during surgery sizers are used to determine which specific implant, in you, gets the results closest to your goal photos. Then the real implant of that volume is placed into the pocket. If your doctor only takes one implant with the hope it might be OK, you may want to get another consult or two before undergoing the surgery.