I have a PIS. The 24 mm were way too small, so I ordered the 30mm. They were better but still the sides were touching and there was skin being left on the shield. So i got the 36mm. The first couple of times they looked like the video on the Medela site. But now, its like my areola swells to whatever size I use cuz its touching the sides again. Its not uncomfy so I am not worried. But has anyone else experienced this? Am I doing something wrong to make it take in too much breast or something?