When explaining this lesson, I described it by taking a "leap" instead of a step when creating all of the lines. With making the space a little larger, there will be plenty of space to color in a pattern of colors.
You can use 8 1/2" x 11" white construction paper or 12" x 18" white construction paper. If I do say so myself they, this project looks fabulous large. It takes more time, but it's worth the students effort.
More second work, Self-portraits inspired by the book "The Bad case of the Stripes"