To close it, I made two of these modified frog closures. First I made bias tape by cutting strips of fabric, folding, and pressing them, then sewing one edge closed. To make the knot, I knotted one end loosely, then pulled the other end through the loop of the knot, which kept the knot from being too bulky. I used a few hand stitches to secure the knot, then attach it to the pillow. Overall, I like how they look, although the closure is gapping a little between the knots since I didn't allow enough overlap. A few sew-on snaps should solve that, though.