The original is larger than my bead (my bead measures 2 cm in height, and 1.75 cm in diameter). I made mine smaller because I did not have a mandrel which could make a hole as large as the extant bead, so making it full size would have required a huge amount of glass and time.
Here you can see a section of the cane that I pulled to make the murini. It is about 20 inches long.