It is very difficult without assessing you in person to know what implant size will be a good size for you. Keep in mind that implant size selection not only depends on your personal preference, but it also depends on your unique measurements. There are various types of implants that can help...
But the distribution of volume will change and may give the look of being fuller. If you desire just small amounts more, you can always consider fat grafting down the road and that can be done in the office.
While your one breast appears ever so slightly lower than the other, at this point you appear pretty normal. Not knowing what your breasts looked like before surgery limits our ability to judge.