What is most natural breast augmentation to get it as big as this? (photo)

hello thank you for your question and provided information as well. based on the photo shown, the ideal would be to be consulted in person by a certified plastic surgeon who sees your case and gives you the guidelines and guidelines of which techniques would be ideal for the result you want?

An implant will augment the breast you naturally have. Putting a large implant into a smaller breast won't necessarily achieve the same result as augmentation of a larger more ptotic breast.

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. This will ensure that you avoid the dreaded "fake" look. It is also important to define "natural" for your surgeon as most assume this to mean an matching size to frame. Small patients tend to have small breasts and vice versa. Smaller framed individuals will oversized implants do not tend to appear "natural." A good rule of thumb is the bigger = faker.
As always, discuss your concerns with a board certified plastic surgeon (ABPS).

Hello and thank you for your question and photo. The most natural appearing augmentation can be performed by fat transfer in which fat is harvested from another area and placed into the breasts. However, you will not be able to achieve the size you are showing in the picture without an implant. It is best to make a consultation with a board certified plastic surgeon to discuss your goals and concerns. This is the only way to determine what would be  the best size for you. Best of luck. 

Hello and thank you for your question.  The
best advice you can receive is from an in-person consultation.  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.   Make sure you specifically look
at before and after pictures of real patients who have had this surgery
performed by your surgeon and evaluate their results.   The most
important aspect is to find a surgeon you are comfortable with. I recommend
that you seek consultation with a qualified board-certified plastic surgeon who
can evaluate you in person.
Best wishes and good luck.
Richard G. Reish, M.D.  FACS
Harvard-trained plastic surgeon