Out of curiosity, are rovner ligatures "specifically designed" for CBC mouthpieces the same size as Bass Clarinet rovner ligatures? I am asking this because I bought a BG L92SR Super Revelation Contrabass Clarinet ligature thinking that it would be big enough to fit snugly on my BBb mouthpiece, but not to the point where it would just barely be big enough. When I received the ligature, to my disappointment, I found out the latter to be true. It looks like it's the same size as a rovner Bass Clarinet ligature. There is even printed (on the inside of the ligature) "Contra Bass Clarinet". The ligature itself looks like a rovner ligature. Any answers to my question are appreciated.