The second item I cut was the 15×15 pillow.
My insert was actually 16×16 and I bought it at Walmart. The difference between making the bed scarf and a pillow- I had to cut lining for the pillow. The shower curtain was a bit sheer to stand on its own. I grabbed leftover plain off-white fabric. I cut a total of four 15.5 x 15.5 inch squares. I sewed the print fabric to the plain fabric to create two 15.5 x 15.5 inch squares. Next step is to sew the two squares together – leaving the bottom open to insert the pillow form. Once I inserted the pillow form I folded the raw edges in and pinned the seam closed. Final step… sew the bottom opening shut.