Hoping you guys can clear up some confusion about breast pump flange sizing. My pumps came with a 24 and 27. With the 24 the nipple doesn’t touch the sides until about halfway through a 15 minute pump session as the suction causes the nipple size to increase. By the end it is rubbing. The 27 is large enough that it pulls a little bit of aereola in with it. I just felt that wasn’t right do have never continued further to see how it changes once the suction gets going. My question (finally lol) is which one is the proper fit?