The Livejournal sizecharts is a fairly comprehensive survey of brands available. It is not exhaustive and particularly does not include knock-offs (rightly, IMO). You could fill in the gaps with the sizechart at menstrualcup.co (under "Compare menstrual cup brands"). Last I checked, it included a few brands that aren't on the Livejournal sizecharts.

If you are talking financials, I have no idea where you would get that info, other than aggregating info from the various brands.

There are many different size charts over at the Community FAQ as well as the one at http://sizecharts.livejournal.com/

Going off on a tangent:
As a newcomer, how can we make the FAQ more prominent so others like you can and will find it? What information would you like to see there? We were discussing that at http://menstrual-cups.livejournal.com/3315322.html if you'd like to weigh in.

Edited for clumsy wording.

Edited at 2014-07-27 03:08 pm (UTC)

kiradi8,

I was looking for information about market share, penetration of the cups, adoption, etc.

How many people around the world are using cups vs. tampons vs. pads?

Thanks a lot!
Gabi