Hi 🙂
You can decide up until the day. I was in same situation as you because my surgeon had offered me overs and I was adamant I wanted partials. After doing weeks of research and listening to what the consultant has to say, I have decided that overs would be better for me personally. I would discuss it with your surgeon further if you are still unsure, but mine told me to make my decision before the day Rather than sit there on the day of surgery and be stressing over what you want. He also ‘politely’ reminded me that he has a lots of surgeries to get through in one day and he doesn’t have time for all the questions on the day Haha.
I’m a 34b and I’m having 400/425 overs on 24th November xx