The name of this piece, Inflatable Butterfly Mouthpiece, pretty much says it all. This won't fall out of your mouth! The flaps fit behind the lips in your cheeks.
Non-Inflated Girth 13cm - 5.2 Inches.
Made of standard molded latex/rubber with a thickness of about 0.015", 0.40mm
If this is an inflatable item it will safely inflate to "about" double girth and length will change slightly.
These inflatables tend to expand more in the largest area and not at the ends.
Since they are like a balloon they will conform to whatever space it has been inserted into,
and how it appears inflated in your hand will not represent how it looks when in use.
All latex/rubber items come unpolished. Image may show item after polishing.