I just improvised. 1) Add 1 in to length & 1 in to width of final size & cut 2 rectangles. 2) For sides add 1 in to height & cut 1 strip for each side in step 1. Cut 2 lengths of pipping to 1-2 inches longer than the sewn together strips. 3) Sew all the strips together with 1/2 in seam allowance. 4) Pin the piping between the right sides of strips and edge of 1 big rectangle. 5) Sew all three layers together carefully and slowly using a zipper foot. 4) Pin the pipping between the right sides of the last rectangle and pieces sewn in the last step. NOTE: on one short side pin the pipping to just one layer so that you can get the stuffing or pillow form in. 5) Carefully sew all three layers together with a zipper foot. NOTE: On one short side sew just two of the layers. 6) Flip right side out. 7) Insert filling. 8) Sew short side.from the outside by tucking the seam allowance in and sewing it as close to pipping as possible. Hope that helps!