What size implant is best for breast width of 14 inches?

Unfortunately,
you have not told us your bra size. If
you are 32 or 34 each 100 cc’s of implant corresponds to 1 cup size
change. If you are 36 or 38 each 200
cc’s of implant corresponds to 1 cup size change. From this, you can compute the volume
required to achieve your desired goal. I
always recommend small round textured silicone gel implants placed
retro-pectoral since they look and feel more natural, are more stable, less
likely to ripple or have complications needing revision. Implant profile is irrelevant in the retro-pectoral
position since the muscle compresses it. Best Wishes,Gary Horndeski, M.D.

Ultimately, careful communication of your goals, careful measurements (dimensional planning),  careful selection of appropriate breast implants and skillful execution of the procedure will be important steps in achieving your goals.
 
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're 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. I have found that the use of words such as “natural”  or “B or C 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.



The use of computer imaging technology may also be helpful to patients;  this technology allows patients to visualize what their breasts may look like with different sizes/profiles of breast implants. I have found this modality to be a nice addition to the communication “tools” available.
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.

I hope this (and the attached link) help.

It is important since you have a small delicate body frame that you do not have a breast implant that is too large.  I agree that a 14 cm with considering you're size would be very unusual.  Try to take a tape measure and major from the beginning of your fold at the middle of your chest out to the end of your fold at the side of your breast.I agree that your choice of size is most important resident blindly following a chart of breast implant recommendations.  You should undergo a breast implant sizing system evaluation during which implants of various sizes were placed into your sports bra.  Please see a board certified plastic surgeon who has an outstanding reputation in your community.