In this type of toy That reminds me is far more important than the diameter of the length, the following evaluation in Kurfassung:
Diameter: 5 stars => delivers what is promised - without corners or edges
Length: 3 stars => unfortunately unwieldy when it comes to storage space - also you do not get the whole length * pure *
Finish: 5 stars => slight veining for good feeling and the strong suction cup keeps its promise - the product is for me personally something zuuu soft, but that's really a matter of taste ...
All in all I think are 4 star rated fair.