There was a suggestion in the Vintage Haircut thread about starting a thread dedicated entirely to the Middy haircut - How it is cut, styled, etc.
The Middy was the most popular haircut in the 1940's. The top and sides were kept shorter than the back hair for easy styling of rolls and bangs, the back hair was grown as long as desired and cut in a "U" shape. Here is a diagram:
I wear a Middy myself. Let's post questions, results - Anything Middy related!