http://www.wildlife.utah.gov/pdf/cmgtplan.pdf
please note page 3 of the Utah Cougar Management Plan, where it states that at 3 years of age when the cougar becomes full grown, it will measure from 6 feet to 8 feet in length from the tip of its nose to the tip of its tail, with a rare few being slightly larger or smaller

You just stated the World Record P&Y mountain lion measured 12 feet from nose tip to tail, which is the most unbelievable thing I' ve heard on the internet in awhile. Scott Moore' s animal harvested in Wyoming in 1993, the World Record P&Y Cougar, was just a hair over 9 feet from nose tip to tail tip. An INCREDIBLY large animal, but only 6 feet of it was body, and 3 feet of tail.

I' ve seen 3 cougars in the wild, they are impressive creatures, but they are not the size of tigers and african lions as you are insisting they are.