Anael, the book says you'd need 10 yards of beige, and that included 2.5 yard for sashing and border. So I was figuring it needed 7.5 yards for the background. I know quilts with small block like this use a lot more fabric as so much ends up in the seam allowance.
I did one quilt that was all 1.5" squares, so for each square inch of fabric showing, you had 1.25 square inches of fabric in the seam allowances. Makes for a heavy quilt.