Too many men with women avatars here.

[Chutzpar]

not that you can tell from any of the oblique angles
and not that digit ratio is 100% accurate

but sure let's go with that

Well the sailor one kinda shows it.
Basically if you are a girl your index finger will naturally be longer then your ring finger and vise versa for males.
However some people do have both the fingers be the same height.

nope.
Theres a trend for that, but that isn't to say that any woman with a longer ring finger has A TERRIBLE SECRET.