Which size implant would be best for my frame? Concerned about width (photo)

An implant base width of 2 cm greater than your chest width is probably pushing it a little to avoid visibility of the implant edge, rippling, and to obtain the ideal aesthetic outcome. If you'd like to maximize volume with a reasonable BW, go for a higher profile.

Choosing an implant size/style is an important decision which is best made in concert with your surgeon. Ultimately, options are based on a number of factors including:
-Chest dimensions: This point is crucial as the width of your breasts defines the available "real estate" on which the foundation of your augmentation is built. This "foot print" is the absolute limit with which you are dealing. Too "large" is not so much the risk as too "wide." You cannot build a 3 acre mansion on a half acre plot. An implant which is too wide (exceeding the available space on your chest) will generally over hang laterally making it more noticeable and occasionally contributing to discomfort and nerve symptoms (numbness or tingling). This will also contribute to a more unnatural look.
-Tissue quality: This relates to size in the sense that the implant will be suspended by your tissue. Too large an implant may place took large a stress on these suspending tissues leading to healing problems in the short term and bottoming out in the long term.
-Patient desire (what is the look you are hoping to achieve?)
My role as a surgeon is to manage expectations and guide you towards a prudent choice which can satisfy these reasonable goals. Often times, a surgeon can guide a patient toward a size/cc range and patients will make determinations on implant style/profile. Patient seeking more or less projection, or seeking a more pronounced or subtle upper pole volume increase can be guided toward an implant which will help them best achieve their goals. Additionally, technique variations (sub muscular vs. sub glandular) can also aid in obtaining the look you desire.
There are a number of tools available to help guide patient/surgeon decision making including sizers, 3D imaging and goal photos. Each modality can help better communicate your goals to your surgeon and vice versa.
Ultimately, it is important to not marry oneself to a particular "cc" as oppose to a particular "look." Communication is key as you and your surgeon create your custom surgical plan.
With regards to your specific question, BWD is a guideline to inform a choice. I typically recommend staying with 1-1.5 cm of your measured base width (as this is a subjective measure and can vary). I also would not struggle over small variations in size as your listed choices differ by less than half a shot glass.
As always, discuss your concerns with a board certified plastic surgeon (ABPS).

Thank you for your question. You will likely get a wide range of responses from different surgeons, as there is no universally-accepted breast implant sizing system. I prefer to insert implants that have a slightly smaller diameter than the person's breast width, to ensure there is proper tissue coverage of the implants, and decrease the risk of seeing or feeling the implants under the skin. However, this general principle is not always followed, For example, if there is an unusually large gap in between the breasts, wider implants might be an option to help narrow the gap, while acknowledging there won't be much tissue coverage in this region. Even though you provided your breast dimensions as measured by your surgeon it is not possible to offer proper advice without an in-person consult. The breasts don't have well-defined borders so even these measurements will vary from surgeon to surgeon. The surgeon(s) who you have seen for a consultation will be the best source of advice when choosing your implants.

Dear amandaaa123,
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, MDCertified, American Board of Plastic SurgeryMember, American Society of Plastic SurgeryMember, American Society of Aesthetic Plastic Surgery

Usually, your surgeon will recommend a size range based on your current body dimensions and goals. This recommendation will allow you to achieve your goals without compromising your safety.

After I measure and discuss goals with my patients, we then look at pictures of women (my patients) with similar measurements with different size breast implants. They also get to see what they would look like when the breasts have fully dropped and fluffed and in clothes. You get to see actual results and the surgeon' s experience and not a virtual idea of what can be achieved. Women tell me that this process is very helpful in determining what is right for them. Whichever you choose, it takes 3 to 5 weeks to get used to before you feel the implants are part of you. Dr. Ted Eisenberg, Board Certified Plastic Surgeon and Author. RealSelf Distinguished Hall of Fame Inductee. Philadelphia, Pa., USA

There really wouldn’t be much difference between the two. Because you are so tiny I would probably stick with 345. It’ll be plenty

Choosing an implant size is a very complicated process and I think having patients select them after some measurements would be like building a house after measuring the lot size.

I would sit down with your plastic surgeon and discuss all of your options in terms of implant style and volume and width etc. I know patients want to pick their own implant, but in my experience over the years it is really difficult to for a patient to do that and it is much better to lean on your plastic surgeon's experience to help.

At 5'2" and 110 pounds, I would suggest choosing the smaller implant. It will also fit your base better.

Breast width is one factor used in determining the correct implant for you, but there are others. Further discussion is needed with your surgeon about your concerns and the look you are desiring. I use breast sizers during augmentation to help select the implant that best fits the breast space and is most in line with the patient goals. I've included a video that I hope you find helpful.