Measure and Mark Your Zipper Placement
Before you cut or sew anything, decide where the zipper will sit on your finished pillow. Most people put it on the back or along one edge so the opening is hidden when the pillow is displayed. Measure your pillow dimensions and mark a line where the zipper teeth will run — this is usually 1 to 2 inches from the edge of your fabric, parallel to the seam line.
Your zipper should be slightly shorter than the side it's closing. If your pillow is 16 inches square, use a 14-inch zipper. Mark the start and stop points with a fabric pencil or tailor's chalk so you know exactly where to stitch. This prevents the zipper from running all the way to the corners, which can make the pillow harder to turn right-side out and stuff.
Key Takeaways
- Cut two fabric pieces for your pillow, then mark where the zipper will go on one piece before sewing anything else.
- Pin the zipper face-down to the fabric with the teeth aligned to your marked line, then sew it down with a zipper foot set to the correct side of the teeth.
- Fold the fabric over the zipper and topstitch from the right side to create a neat, finished seam that holds the zipper flat.
- Sew the remaining three sides of the pillow closed, leaving the zipper opening unstitched, then turn the pillow right-side out through the zipper opening.
- A zipper foot is essential — a regular presser foot cannot get close enough to the zipper teeth without hitting them or leaving a gap.
Prepare Your Fabric Pieces and Zipper
Cut two pieces of fabric to the exact same size — these will be your pillow front and back. If you're making a 16-inch pillow, cut two pieces that are 17 inches square (the extra half-inch on each side is your seam allowance). Press both pieces with an iron to remove wrinkles, which makes marking and sewing much easier.
Unzip your zipper completely and lay it flat. Check that the slider moves smoothly from end to end. If it's stiff or catches, work it back and forth gently with a small amount of silicone lubricant on a cloth — never force it. A stuck zipper will jam while you're sewing and can break the needle or damage the teeth.
Pin and Sew the Zipper to the First Fabric Piece
Lay one fabric piece right-side up on your work surface. Place the zipper face-down (teeth pointing toward the fabric) along your marked line, with the zipper tape aligned exactly to the line. Pin the zipper in place every 2 inches, keeping the pins perpendicular to the zipper so they don't shift when you sew.
Install a zipper foot on your sewing machine — this is a narrow presser foot that can stitch right next to the zipper teeth without hitting them. Set your machine to a straight stitch and a medium length (about 2.5 mm). Sew along one side of the zipper tape, starting at one end and stopping at your marked endpoint. Backstitch at both ends to lock the thread. Remove the pins as you go.
Flip the fabric over and sew the other side of the zipper tape the same way, keeping the stitching parallel to the first line. The two rows of stitching should be about 1/4 inch apart, one on each side of the zipper teeth. This holds the zipper securely and keeps it from shifting during assembly.
Topstitch to Flatten and Finish the Zipper Seam
Fold the fabric so the zipper is sandwiched between the two layers, with the zipper tape hidden inside. Press this fold with an iron to crease it firmly. This step is what makes the zipper look professional — it keeps the fabric flat and the zipper from puckering.
From the right side of the fabric, sew a line of topstitching about 1/2 inch away from the fold. This stitching runs parallel to the zipper and holds the folded fabric in place. Use a regular presser foot for this step since you're no longer sewing directly over the zipper teeth. Backstitch at both ends. This topstitching is visible on the finished pillow, so keep it straight and even.
Attach the Second Fabric Piece and Close Three Sides
Place your second fabric piece right-side down on top of the first piece, so the right sides of the fabric face each other. The zipper is now sandwiched between the two layers. Pin around all four sides, keeping the pins 1/2 inch from the edge.
Using a regular presser foot and a straight stitch, sew three complete sides of the pillow with a 1/2-inch seam allowance. Start at one corner and sew all the way around, stopping when you reach the fourth side. Do not sew across the zipper opening — leave that entire side unsewn so you can turn the pillow right-side out. Backstitch at the start and end of each seam. Trim the corners diagonally (about 1/4 inch from the corner stitch) to reduce bulk when you turn the pillow.
Turn the Pillow Right-Side Out and Stuff
Unzip the zipper about halfway. This is the step many people skip, and it makes turning the pillow much easier. Reach through the zipper opening and gently pull the fabric through, turning the pillow right-side out. Work slowly and use your fingers to push the corners out fully so they are sharp and square.
Once the pillow is turned, press it with an iron to set the seams flat. Fill the pillow with polyester fiberfill or your preferred stuffing, working it into the corners first so they stay plump. Zip the opening closed. The zipper is now functional and hidden inside the seam — you can open it anytime to adjust the stuffing or wash the cover.
Common Mistakes to Avoid
The most common error is sewing the zipper with the slider in the way. Always unzip the zipper completely before you start sewing, and keep the slider away from the presser foot as you work. If the slider is in your path, stop, raise the presser foot, slide the zipper slider backward, lower the foot, and continue.
Another frequent problem is sewing too close to the zipper teeth, which causes the needle to hit the metal or plastic and break. The zipper foot exists to solve this — it positions the needle just far enough away. If you use a regular presser foot, the stitching will be too far from the teeth and the zipper will gap or pucker.
Forgetting to unzip the pillow before turning it right-side out is also common and frustrating. The zipper opening is your only way to access the inside of the pillow, so leave it unzipped partway before you start turning. If you've already sewn the pillow closed and forgotten, you'll have to carefully cut a small opening in the seam to turn it, then hand-stitch that opening closed.
Frequently Asked Questions
Can I use a regular presser foot instead of a zipper foot?
You can, but the results will be poor. A regular foot cannot get close enough to the zipper teeth, so your stitching will be far from the teeth and the zipper will bunch or gap. A zipper foot costs $5 to $15 and fits most machines — it's worth buying if you plan to sew more than one zippered project.
What if my zipper is longer than the side of my pillow?
Trim the zipper to the correct length before you sew it. Cut the zipper tape (not the teeth) about 1/2 inch past your endpoint, then fold that extra tape back on itself and stitch it down by hand to seal the end. This prevents the cut edge from fraying and keeps the slider from running off the end.
How do I fix a zipper that jams while I'm sewing?
Stop when ready and raise the presser foot. Gently slide the zipper slider backward away from the needle. Check that no fabric is caught in the teeth. Lower the foot and continue sewing. If the zipper is truly stuck, remove it and replace it with a new one — forcing a jammed zipper can break the needle or damage the teeth permanently.
Should the zipper opening be on the back or the side of the pillow?
Either works, but the back is more common because it's hidden when the pillow is on a couch or bed. A side opening is fine if you prefer it — just make sure the zipper is at least 1 inch from the corners so the seams are strong and the pillow doesn't tear at the corners when you open and close it.
Can I sew the zipper after I've already sewn the pillow closed?
No — you must install the zipper before you sew the other three sides. If you've already sewn the pillow closed, you would have to cut open one seam, install the zipper, and hand-stitch the seam closed again, which is much more work and looks less neat than sewing it in the correct order.