Envisioning Wizarding Robes

[elady25]

OK, I am a somewhat talented seamstress, and would love to sew some 
wizarding robes for the book and movie releases this year.  However, 
I am still having trouble envisioning what they look like, so I turn 
to you, my fellow fanatics.

A cloak is fairly simple, as an overcoat, but what goes underneath? 
And I'm not talking movie contamination, what kind of robes would I 
wear?  Also, what would be the difference between school uniform 
robes, dress robes, and everyday Jane Doe wizard robes?  How would 
robes differ between male and female?  I'm really having a hard time 
wrapping my head around this one.  Now, I know there are a million 
ideas out there, but send them along.  Anyone who has made your own, 
and isn't afraid of imitation, please send a picture.  

Also, I am a late-twenties homemaker, so...too old for Hermione, too 
young for McGonagall...could possibly pull off Tonks, or simply 
reinvent myself as a witch.  What is your take on this sort of 
characterization?

I know I'm a little freaky about this stuff, but historically 
accurate costuming is kind of (another) little obsession I have.  
JKR, if you see this, please write "Wizard Wear: Ancient to Modern 
times" and release it like FBAWTFT and QTTA.  

imamommy
Who is in a community theater production of "Bye, Bye Birdie" and 
seriously considered buying vintage 50's undergarments from EBay, 
just to be sure my costumes would be historically correct.