Being a bit at a loose end and with nothing better to do I set about trying to measure Austin's hindmost part.
So there you have it! Best I could ascertain, given the prevailing conditions, is that it is somewhere between 11 and 12 inches. By comparison, Tigger's, using a mathmatical pro-rata type equation thingy, must be about 9 inches and a bit on the puny side. Given the relationship between the two - close, but with Austin in the ascendancy (even though he is smaller and lacking accoutrements) - I would suggest that it is the length and breadth of the tail that determines who is top cat in the pack. Using the same analogy, I would hazzard a guess that Big Ginge's tail is about two foot long, even though I cannot get anywhere near it.