You have exactly the same stats as me. I’m 5ft 7 and weight wise, usually about 60kg but due to lockdown closer to 65kg now probably. I had my surgery last week so I’m about 5 days post op now, and I went with 300cc HP dual plane at the recommendation of my surgeon. He actually said he wouldn’t have been able to get much bigger in me (don’t know why) so no idea how these girls get 400+ ccs in them. Either way, I definitely wanted a very natural look, at the moment I actually feel like I wish I could have gone bigger however think once they’ve dropped they’ll be perfect for my frame. I’d suggest 250 wouldn’t be much of a change and would recommend 300-350cc. I was a 34A cup to start with, looking at them now I’d estimate I’m a C but who knows!