Too large implants... How many ccs do you have to decrease to do a redo operation? (Small implant to start with).

At 3 months post-op, I would suggest waiting a few more.  Your breasts could still change and you might feel differently in 3 months.  Should you decide then that you'd like to move forward, I tell my patients that in order to change a cup size, we should go down about 100-150 cc's.  Going down any amount of cc's, especially when you only have 190 cc implants to begin with, will make a difference on your frame.  When you visit your PS, lay the implants side by side on the table.  You will be able to see the difference going from 190 to 135 can truly make.  Good luck!

Making a suggestion that you need to go 150 cc smaller is neither thoughtful nor scientific.  In fact, you are a perfect example of why that suggestion is inaccurate.  For you, a change in volume of 30% (to 135 cc) would most likely be significant enough to make you satisfied.

The first advice I would give someone 3 months out and with size concerns is too be patient.  Many times the tissue stretches with time and the implants drop and a more natural look is achieved with time.  Going back to surgery this soon would be a big mistake.Additionally, some perspective:  190cc is actually among the smallest size implants plastic surgeons ever use for augmentation.  So the initial size choice was actually quite reasonable for your petite frame.So again the best advice, do not even consider additional surgery until you are one year out.  I suspect you will find things are acceptable at that point. 

Thank you for the question. You will find that online consultants will not be able to provide you with specific advice in regards to selection of specific breast implant size/profile. Ultimately, careful communication of your goals will be critical.
Generally speaking, the best online advice I can give to ladies who are considering revisionary 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 "B or C cup” etc means different things to different people and therefore prove unhelpful.
Also, as you know, cup size varies depending on who makes the bra; therefore, discussing desired cup size may also be inaccurate.
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). Viewing the patient's chest wall in the upright and supine positions, with temporary sizes in place, help select the best breast implant size/profile for the specific patient.
I hope this, and the attached link (dedicated to revisionary breast augmentation surgery concerns), helps. Best wishes.