My natural breast width is 14 cm. What is the range of recommended implant widths that will look natural for my chest?

It is very difficult without seeing you in person to know if the implant sizes you mentioned are appropriate for you.  Also, implant size selection depends on your unique measurements, so what may be too small for one woman may be perfect for another. Lastly, the choice of implant size is also a matter of taste. What you think may be too small, another woman may think is too big. We have a device called the Vectra 3D imaging system that shows you what you will look like with any implant. Our patients are very happy with the choice of implant they make when using this system.

Thank you for your question. Although breast width is a very important factor in tissue based planning and selection of breast implants, there are various other anatomical factors that are considered in picking an implant size for you. The overall goal is for the plastic surgeon to understand your sense of aesthetic, your desired 'look'  and recommend implants that would work for you. This requires an in-person examination with a board-certified plastic surgeon who you feel comfortable with. Sometimes, it may take more than one or two consultations to find the right surgeon for you. Good luck with the process. 

Thank you for the question.  There are no hard and fast rules when it comes to diameter of breast implant versus diameter of breast (band width). In other words, these measurements are useful but are only one of the many factors come into play when it comes to selection of appropriate breast implant size/profile. Other factors involved include surgeon dependent factors: for example, careful breast implant pocket dissection and careful selection of breast implant size/profile.  
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.
 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 know 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/video, dedicated to breast augmentation surgery sizing concerns) helps. Best wishes for an outcome that you will be very pleased with.