12 to 18 months 12 being minimum.. my surgeon said the longer u wait the better due to tissue growth etc.. i had mine done 9 months ago and wanted bigger from day 1 of having them but now im doing the sensible thing and waiting until early next year to upsize i didnt have much tissue and i have thin skin so want to give them the best chance lol.. getting my tummy done in a few months so works out perfect really x