I wear a 32A bra and I'm 30 inches around under my bust. I ordered a medium breast pump because I read that I should buy a little over what I think I needed since my breast would grow into the cups. Unfortunately, these contoured cups do not fit, no matter what position I am in. There are big gaps no matter how I try to do it. Also, I never feel any suction, even when I use it on a different part of my body such as my stomach (just to see if it works). I feel like it does absolutely nothing. It leaves no ring mark, nor do I feel anything from it even if I press really hard for a long time. I even put my finger up to the tubing to see if I felt any suction when I pumped and I felt nothing. Is it possible my pump is defective? I'm pretty sure I ordered too big anyways. I don't know if I can get my money back. I am extremely dissapointed and I was looking forward to this so much.