Funny you should mention ankles. In the old days of Joshi Judo (Women's Judo) the pants legs had to be pegged so that there would be no shameful exposure of the calf.
Look at the pictures at http://judoinfo.com/goshinho3.htm
to compare the man's pants with the woman's.
We won't even go into the white stripe down the center of the belt to denote that they were, you know, women.
Aikido of Norfolk