about a 340ccc- 380cc wud give you that size!! i was only a 34b and had 340 and now a 32e!! but to be on the safe side if i was you, id opt for 410cc plus!! then you will def achive a good big size!!. Also fake boobs are smaller looking than real ones! like for example my 32e looks only a lrage d in clothes!! if you know what i mean! so what ever you are offered go the biggest you can get! as you never end up too big! everybody always wishes they were bigger XX i do XXX