I too saw Moncha's cut out and thought that it was a bit small for me. I took an 8 1/2" X 11" piece of paper, turned it on it's side and layed it on the outside of the back window. Then I used my finger to rub it against the bottom of the glass, which made a crease and a template to use for cutting my Van Eyes. I cut it down several times until I got it to the height that seemed right (about 5" for me). But if you use this method, you can cut it, stick it to the inside of the window, trim it again, etc - until you get it how you want it - worked for me!

I went to the gas station and nearly backed into a car (you've heard the "c" hair analogy? - I SAW IT!) I went straight to Pep Boys and bought the Van Eyes - what a difference! Great mod!