Everyone is different hun and the same sized implant on 2 girls with the same stats can produce a completely different look. If you want to ‘look’ a d then its important to tell your surgeon this. Bring some pictures in of boobs you like and ask him what cc he thinks you’ll need.
In answer to your question, I think you’ll be at least a d with 340cc implants.
I am 5foot 2, 8 stone 8 and currently a 34b Im toying between 320 and 340 to achieve a d.
Good luck with your decision but I would trust your surgeon xx