I'm looking for natural looking & size DD breasts cup. I don't want to see the outline of the implant. Any suggestion? (photo)

Much of the final “look” achieved after breast augmentation surgery  depends on several factors:
1. The initial shape, size (volume of breast tissue), symmetry of the patient's breasts. In general, the better the  preoperative breast appearance the more likely the breast augmentation “look” will be optimal. You are starting at a good place.

2. The experience/skill level of the surgeon is important in determining the final outcome. For example, the accurate and gentle dissection of the breast implant pockets are critical in producing  long-term  well-placed breast implants. I personally think that these 2 factors are more important than any others, including type (saline or silicone)  or model (low/moderate/high profile)  of implant.

3. The type of implant used may  determine the final outcome, especially if the patient does not have significant covering breast or adipose tissue. For example, some surgeons feel that silicone implants have a more natural look and feel than saline implants because silicone gel has a texture that is similar to breast tissue. Each patient differs in the amount of breast tissue that they have.  If a patient has enough breast tissue to cover the implant, the final result will be similar when comparing saline implants versus silicone gel implants.  If a patient has very low body fat and/or very little breast tissue, the silicone gel implants may provide a more "natural" result.  4. The size and profile of breast implant used may  make a  significant difference in the final outcome. Therefore, it is very important to communicate your size goals with your surgeon.  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 “C or D cup” or "fake looking" etc can be confusing...
Also, as you know, cup size varies depending on who makes the bra; therefore, discussing desired cup  size may also be inaccurate.
I use  intraoperative sizers and place the patient in the upright position to evaluate breast size. Use of these sizers also allow me to select the breast implant profile (low, moderate, moderate plus, high-profile) that would most likely achieve the patient's goals. The patient's goal pictures are hanging on the wall, and allow for direct comparison.
I have found that this system is very helpful in improving the chances of achieving the patient's goals as consistently as possible.
 I hope this, and the attached link, helps. 

Breast augmentation is a very powerful technique in the right hands, and can have dramatic results in a variety of breasts types. Size is a tricky question for many women who choose breast augmentation.

There is an ideal shoe size for your foot. Too small and your foot will be crammed and too large and your foot will not fill the shoe. The same thing is true with breasts: too large and it will look round and fake; too small and it will be loose and empty on the top.

The common denominator to the most beautiful breasts is that they were sized objectively on the basis of measurements. We combine a proven formula based on measurements of the rests and chest along with through discussions of patient's desires. Photos of ideal breasts and results from patients with similar breasts are often very helpful in the discussion. A rice test in the office or at home can also be very helpful. The key is to work with a Board Certified plastic surgeon with expertise and experience in breast augmentation. Don’t settle for less!