Should I be getting different size implants in each breast?

The procedure takes one to two hours. You will likely be given general anesthesia, during which you will be "asleep" and pain-free.

The surgeon will make a cut under your breasts, under your arms, or around your nipples, depending on your body, the type of implant, and how much enlargement is being done.

The surgeon will put the breast implant into a pocket above or below your chest muscle. After the implant is in place, the surgeon will close the cuts with sutures or surgical tape.

Hi & thanks for your question.
I suggest you reach out to your surgeon to talk with him/her again, prior to having surgery. It is important that you and your surgeon are clear on your goals and the desired outcome. Best wishes!

Your smaller breast is not tuberous, shaped like a tuber, and I would choose different sizes if you are getting gel implants, or different fill volumes for saline.