Here are photos of the mural finally going up on the elementary cafeteria wall. I never did pre-measure, I just eye balled it and thought it would fit. Thankfully it was within about seven inches from the ceiling and fit perfectly with the width of the windows!
This is the view when you walk into the cafeteria. When the students saw it for the first time you could hear the "Oooohs and Aaaahs" from down the hall. They were very proud of their hard work!