Next, cut one of these side panels in half long ways. This is where you will place your zipper. Once you have cut it, pin your zipper to one of the panels (right side up) where you made your cut, with the zipper facing down – as shown in the photo. Using a zipper foot, sew a 1/4 inch seam. Repeat this on the other side, making sure that the fabric lines up evenly, as shown in the 3rd photo below.