Gender of Oz

A quick introduction to studying gender roles in our culture. These are the top hits when using Google images to search for Wizard of Oz costumes. Click this report to view a better size.What theories of gender would you draw as a total outsider to our culture?
-Females are not allowed to completely cover their legs?
-Only males are allowed to wear face paint?
-Males can't dress as female characters but females can dress as male characters?
-Females must stand awkwardly. Males must stand straight?
-Males should wear bulkier hats?

Anything else?