I am 47. My implants are 25 years old. Saline. 5 kids. 110 pounds. 5’4”. I am replacing my implants for silicone. The implants I have now were very high and round until the last 5 years. I would like to avoid that. I want to go bigger but I would like advice on how much bigger I can go. Also which implant would be best to give me a very natural shape, not round balls on my chest.