Measure the pillow form to determine how much fabric you need. Ours form is 17” square. Add one inch to this measurement for a seam allowance and that’s the width the fabric needs to be. Multiply that width by two to determine the length. Then add 3” to 4” for an overlap of the fabric at the back of the pillow. In other words, 17” + 1” = 18” x 2 = 36” + 4” = 40”. Measure and cut the fabric to your calculated size.
Fold the fabric a 1/2” on all four sides starting with the long ends first and iron flat. Make sure the iron is on the proper setting for the type of fabric. You won’t see the longer ends when the pillow is finished, but you will see the shorter ends. So to make it look nice and professional, turn down the two shorter ends another 1/2" and iron flat.
Place the pillow in the middle of the fabric and fold the ends so that you have the correct measurement of the pillow and the fabric overlaps about 3” to 4” in the middle. Pin the overlapping fabric together and slide the pillow form out.
Carefully insert the pillow through the overlap and you're done (Image 1). Whether you're going for a budget-friendly update or perfectly matching your graphic fabrics, creating your own decorative slipcovers is an easy, DIY solution (Image 2).