This hoop is so beautiful, it looks great on the ear, and it's so easy to take on and off, but also not so easy that it pops off on its own. (I have a feeling the people who commented about that might have gotten defective ones.)
Anyway, I wanted so badly to be able to keep this, but the sizing was not right for me. I looked back at my paperwork for my helix piercing, and it seems like the hoops I had were 8mm, but this 8mm was just slightly too tight. It could close, but when it did, there was pressure on my ear.
Customer service is amazing though, and despite me having it accidentally for much longer than the return window, they allowed me to send it back for store credit. I have since exchanged it for a ring that comes in 10mm, and it is slightly big, so I might be more in the 9mm category.
I would recommend this, but I would say keep the original packaging and everything until you are certain it fits.