I'm worried about Motiva 380 (demi) and 425 (full).

I'm having surgery this week and I'm worried about the size.
 Rib cage: about 72
 Chest room: 12~12.5 (average because it varies
 depending on where you go)
 The doctor said that I should choose size 380 (demi) or 425 (full).
 I put the size in. When I look at it, I think 380 looks natural? I didn't have breast surgery, so I think my breasts should be the size they were originally. I do
 n't think the surgery
 will be noticeable. That's why I'm worried. I wonder if 425 is too
 much. I don't have any breasts, and the bones in my new breasts are wide behind, so even if I get a size bigger than other people, it won't be noticeable. I heard that ㅠㅠ
 If anyone has any experience, please let me know.