Finally I finished my first knitted pillow. I used Cascade 220 wool yarn (#5 needles) with the "checkerboard" stitch on both sides. I saved myself a lot of headache and time by using a store bought pillow form (12" by 16"). I used the "mattress" stitch to seam the edges. At first this took awhile to figure out, but by the time I got to the last seam, the seaming took no time at all. I am very pleased with the results.