What piping is and why it matters on a cushion

Piping is a narrow strip of fabric folded over a cord and sewn into a seam. On a cushion, it runs along the edges where the front and back panels meet, creating a finished, tailored look. The cord inside gives the piping structure and prevents it from flattening or fraying after washing.

Piping serves two purposes: it reinforces the seam so the cushion holds its shape longer, and it frames the design of your fabric. A contrasting piping color draws the eye to the edge; a matching one creates a clean, subtle finish. Without piping, a cushion seam can look loose or homemade. With it, even a straightforward fabric looks professional.

You can buy pre-made piping at fabric stores, or make your own by wrapping bias tape around cord. Pre-made is faster; homemade lets you match any fabric or color you choose. This guide covers both routes.

Key Takeaways

  • Piping is sewn between the front and back panels of a cushion cover, with the cord facing outward and the fabric folded edge facing inward toward the seam allowance.
  • You need a piping foot (a special presser foot with a groove underneath) to sew piping straight and close to the cord without crushing it.
  • Pin the piping to the front panel first, clip the corners so the piping bends smoothly, then sew the back panel on top, trapping the piping in the seam.
  • The finished seam should sit just next to the cord, not on top of it, so the cord stays visible and rounded on the edge of the cushion.
  • Leave a 4-inch opening on one side before you sew the final seam, so you can turn the cover right-side out and insert the cushion form.

Gather your materials and tools

You will need two pieces of fabric cut to the same size (your front and back panels), piping, a piping foot, thread that matches your piping, a sewing machine, pins, scissors, and a seam ripper. If you are making your own piping, add bias tape and cord (usually cotton or polyester, 3/16 inch diameter).

Measure your cushion form or the finished size you want. Add 1/2 inch on all sides for seam allowance, then cut both fabric panels to that size. If your cushion is 16 by 16 inches, cut panels 17 by 17 inches. Piping will sit in that 1/2-inch seam allowance, so the finished cover will fit the form snugly.

The piping foot is essential. It has a small groove on the underside that rides over the cord, keeping the needle at the right distance from the cord so you sew close without hitting it. A regular presser foot will crush the cord or sew too far away. Most machines accept standard piping feet; check your machine manual for the correct size.

Make piping or prepare store-bought piping

If you are using pre-made piping, unroll it and lay it flat on a table for a few hours to relax any kinks from the package. This makes it easier to pin and sew without puckering.

To make your own piping, cut bias strips 1.5 to 2 inches wide from your chosen fabric. Sew the strips end-to-end to make one long strip, then press the seam open. Fold the strip in half lengthwise with wrong sides together and press. Lay the cord inside the fold, then use a zipper foot to sew close to the cord, encasing it. Trim the raw edges to 1/4 inch. You now have piping ready to sew into your cushion seam.

Measure how much piping you need: add the length of all four sides of your cushion, then add 2 inches for overlap at the corners. If your cushion is 16 by 16 inches, you need about 66 inches of piping (16 + 16 + 16 + 16 + 2).

Pin piping to the front panel

Lay your front panel right-side up on a flat surface. Starting at the center of one side, pin the piping along the edge with the raw edges of the piping aligned with the raw edge of the fabric. The cord should face outward, away from the fabric. Use pins every 2 to 3 inches, and pin perpendicular to the edge so you can remove them as you sew.

At each corner, you must clip the piping seam allowance so it bends smoothly. Stop pinning about 1 inch before the corner. Fold the piping at a 45-degree angle, then fold it back on itself to create a sharp corner. Clip into the seam allowance of the piping (not the cord) at the fold. Pin the piping down the next side. Repeat at all four corners.

Where the piping ends meet, overlap them by 1 inch. Unravel the end of one piece of piping and wrap it around the beginning of the other piece, then pin both layers down. You will trim and finish this overlap after sewing, so do not worry about it looking perfect now.

Sew piping to the front panel

Install the piping foot on your machine and thread it with thread that matches your piping. Set your stitch length to 2.0 to 2.5 mm (a medium length). Sew slowly, keeping the cord in the groove of the piping foot and the needle just to the left of the cord. The needle should pierce the piping fabric, not the cord itself.

Sew all the way around, removing pins as you approach them. At the corners, stop with the needle down, lift the presser foot, adjust the piping, lower the foot, and continue. This gives you control and prevents puckering.

When you reach the overlap, sew over both layers of piping. Stop about 1 inch before you reach the starting point. Backstitch, then remove the work from the machine. Trim the overlapping piping so the ends meet exactly, then sew the final inch to close the circle.

Attach the back panel and leave an opening

Lay the front panel right-side up with the piping sewn on. Place the back panel right-side down on top, aligning all edges. The piping is now sandwiched between the two fabric panels, with the cord facing outward.

Pin the back panel to the front panel, pinning through all layers. Leave a 4-inch opening on one side (usually the bottom or a side that will be less visible). This opening is where you will turn the cover right-side out and insert the cushion form later.

Install the piping foot again and thread with matching thread. Sew around all four sides, using the piping as your guide. The needle should sit just to the left of the cord, in the groove of the piping foot. Sew right up to the opening, backstitch, then skip the 4-inch gap and resume sewing on the other side of the opening. Backstitch at the end.

Finish the seams and turn the cover right-side out

Trim the seam allowance to 1/4 inch all the way around, cutting close to your stitching line but not into it. At the corners, trim diagonally across the corner to reduce bulk. This step is crucial: thick seam allowances will create lumpy corners and make turning the cover difficult.

Clip into the seam allowance at each corner, cutting to within two threads of your stitching line. This allows the fabric to spread when you turn the corner, so the corner lies flat and sharp instead of bunched.

Turn the cover right-side out through the 4-inch opening. Use a point turner or the blunt end of a chopstick to push the corners out from the inside. The piping should now frame the edge of the cushion, with the cord visible and rounded.

Insert the cushion form and close the opening

Press the cover flat with an iron, paying special attention to the edges and piping. Insert your cushion form through the 4-inch opening. Smooth it into the corners so it fills the cover evenly.

Fold the raw edges of the opening inward by 1/2 inch and press. Pin the opening closed. Use a ladder stitch (also called a slip stitch) to close it: bring the needle out through one fold, cross to the opposite fold, go in and travel inside the fold for about 1/4 inch, come back out, and cross back to the first side. Repeat all the way across. The stitches will be nearly invisible because they run inside the fold.

After closing, press the seam one more time. Your piped cushion is now complete and ready to use.

Frequently Asked Questions

Can I sew piping without a piping foot?

You can use a zipper foot instead, though it is less precise. The zipper foot rides to one side of the cord rather than over it, so you have less control over the distance between the needle and the cord. Practice on a scrap first. A piping foot is inexpensive and worth buying if you plan to make more than one piped project.

What do I do if my piping puckers while I sew?

Puckering usually means the piping is being stretched as you sew. Slow down and let the fabric feed naturally without pulling. If you made your own piping, the bias strip may have been cut at the wrong angle; true bias (45 degrees to the grain) stretches evenly. Pre-made piping that has been tightly rolled can also pucker; unroll it and let it relax for several hours before sewing.

How do I match piping at the corners so the seams do not show?

Plan your piping layout before you pin. If your fabric has a pattern or stripe, measure where the pattern falls at each corner and adjust where you start pinning so the pattern aligns at the corners. This takes a few extra minutes but makes a visible difference in the finished look.

What happens if I sew the piping seam too close to the cord?

The needle will hit the cord and either break or skip stitches. If this happens, use a seam ripper to remove the stitches, adjust the piping slightly away from the cord, and resew. The piping foot is designed to prevent this, so using one is the best insurance.

Can I wash a piped cushion cover?

Yes. Wash in cool water on a gentle cycle and air dry to protect the piping and cord. Avoid high heat, which can shrink the bias tape or cord. If the piping is made from natural fiber cord, it may shrink slightly on the first wash; this is normal and usually not noticeable on a finished cushion.