I could feel mine easily, felt massive. It was 20cm.
With my cyst (left side) I was able to feel a large elongated bump just inside the pelvic bone each morning. Whether it was my ovarian cyst or my (full) bowel being pushed forward, I don't know. But once I went to the bathroom, the bump was gone. Of course now that I've have the surgery, there's no bump any time. I do believe the cyst displaced things.