I’m 5’7″ so a bit taller than you. I was offered 375cc but decided on 400cc so I could achieve that little bit more. I too am a 34a and looking for a full c/d cup, and if given the choice, think going that little bit bigger size is the better option so you don’t regret it. Remember about 25cc is around 2tbsp extra, and 150cc is about a cup size, so it won’t be a HUGE difference, so I say its worth going with the bigger size as 380cc would get you to approx a C and a half. I am not getting mine until the 2nd of April, but this is how I’ve come to making my decision. Have you tried on the fillets for both sizes? X