My bwd is 11cm. The doctor wants to put me on the motiva ergonomix 360cc, which has a diameter of 12.25 cm. How much wider can the implant be placed in relation to my bwd? I don't want to put them that big anyway. 320 cc (11.75cm) would be ideal for me if possible. I am 158cm and 50kg. A cup and I want a small C cup.