What is "ankle length"? Just above the ankle joint, below, somewhere in between? Why is j. crew calling their capris ankle-length? What is the sweet spot that we're all aiming for?

Images would help. I feel extremely impaired in this area.

I feel like I am going to burst out into some sort of Flight of the Conchords song about ankles.

"I'm the ANKLE--OSAURUS,
my questions may bore us -
Capris they confuse me,
Could someone diffuse me?"