That's a good point, Tinoel, because there is certainly no scientific definition of "spinner."  But for comparison, on the Night Calls show both Jesse Jane and Kirsten Price considered each other spinners.  Jesse Jane weighs 107 pounds and Kirsten Price weighs 105 pounds.  And Tabitha Stevens weighs 105 pounds.  So although all three of them are slightly larger than Jenna Haze or Kobe Tai, it is probably possible to argue that they are all spinners.

Again, for comparison, would Daisy Marie be considered a spinner?  Tabitha Stevens is a bit smaller than Daisy Marie.