zebraknot

I've tried and tried and can't seem to get it on. I'm not small but definitely not huge at 7" hard (never measured soft). Just can't get the metal in place after getting the ring on without pinching the hell out of my foreskin etc, and still not able to fit it. Any advice or I'm I just too big.

Looking for a beginner size knotty butt plug, here is the worst part, I want a wearable style base.