It is hard to promise or predict final cup size after breast surgery. With breast lifting, even though no breast tissue is removed, the breast shape and position are changed. This change in position and shape may result in a different cup size or a different level of filling the cup of a bra. For example, a breast that sits lower on the chest wall may require a larger cup size bra than the same volume breast sitting higher on the chest wall.
Therefore you should not base your goals or the success of your operation based on a cup size which may very depending on who makes a bra.
It is therefore 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 cup” or "fake looking" means different things to different people and therefore prove unhelpful.
By the way, the most common regret after this operation, is “I wish I was bigger”.
I hope this helps.