This was also made as a gift. I pretty much winged it. One fits a 20" pillow and the other a 16". I used all Kona Red, White, and Black and quilted it with diagonal 1" lines following the stripe. The inside is all lined nicely with muslin and of course I added a invisible zipper so it's easy to wash! Here's a quick and easy invisible zipper tutorial courtesy of Sew Katie Did.