I brought the Medela Swing Breastpump (even though I have Closer To Nature bottles, but after looking at reviews, it wasn't very good) But I assumed the standard 24mm Breastshield was quite small (My bad maths!) But it's huge! I haven't tried it out (I've not leaked the entire pregnancy, don't want to start now!) but it looks like too much as the areola would go inside it. And I don't want to spend £12-ish on different sizes each. So how do I know what size I need!? I'm 37+3 and I need to get it sorted out soon!