“A skirt that passes the knees by 2 inches” try sitting down with that skirt- are you knees showing? I’m sure they are & according to the jewish law a ladys knees are not allowed to show at all.
“A skirt down to the ankles, with a slit that reaches 2 inches up before the knees” this will probably not show your knees when you sit but a long skirt with a nice slit is something that will defenitely catch peoples eyes & it may attract a mans eyes to your body . . . . i leave the rest to your understanding!!
So in my opinon they are really both unappropriate for a jewish female & heres a tip for a 2 inch skirt that just passes the knees. Just take the hem down & you should get at least another 1/2″-1 1/2″ inches which will make huge difference.