One of mine is slightly bigger than the other i noticed it at around 2 weeks po.. im now 5 months po and its still the same its only noticeable to me.. my left has always been slightly smaller even b4 my op.. so i figured that is why and it wont change.. having implants is basically 2 ops so they can heal at diff rates and will even out.. if ur boobs were identical in size pre op they will sort themselves out xx