I use a 8.5 in 11oz w/ qd. Total length is close to 10". I use this on my AM32. And i need to get a lighter weight for my VT. I really like mine.
It does what a stabilizer is meant to do, if your looking for vibe dampening imo your better off doing it on the strings and riser, w/ a stringstop, and cat whiskers, or heavier arrows. I honestly cannot tell a difference in sound between my bstinger and 4in xcoil. And to be honest with you i think alot of those vibration dampening things are a gimick.
That being said you can always add a bowjax to the end of your stinger as well if that trips your trigger.
I do like my bstinger though, helps me hold steady, killed the jump i had with my AM32, and actually WORKS to stabilize!