For those wondering, my design wall is covered in flannel that is printed with 2 inch squares. I bought the yardage back when everyone was making watercolour quilts, and this was recommended as a designing tool. I still have my 7 baggies of 2 inch watercolour squares, sorted from light to dark, but have never made one yet! I did try a project using the fusible interfacing marked with 2 inch squares. It worked well, but seemed very stiff when finished.
My latest applique blocks will finish around 16 inches, and are destined for a queen-size quilt.