What You Need Before You Start

Sewing a cushion cover requires fabric, thread, a needle or machine, scissors, and a way to measure. You do not need expensive equipment — a hand needle works fine if you do not have a sewing machine, though it takes longer. The real requirement is a cushion or foam pad to measure against, because the cover dimensions depend entirely on what you are covering.

Gather these items: fabric (cotton or a cotton blend works well for beginners), thread that matches your fabric color, sharp scissors, a measuring tape, pins, and either a sewing machine or a hand-sewing needle. You will also need a way to close the cover — either a zipper, buttons, or a straightforward sewn seam that you can open later by cutting stitches. A seam ripper makes opening seams easier, but a small scissors works too.

Key Takeaways

  • Measure your cushion in three directions — length, width, and thickness — then add half an inch on all sides for seam allowance before cutting fabric.
  • Cut two identical pieces of fabric and pin them together with the right sides facing inward, so the pretty side ends up on the outside when you flip it.
  • Sew three sides completely closed, leaving one side open long enough to slide the cushion inside.
  • Turn the cover right-side out through the opening, insert the cushion, and close the final side by hand or machine.
  • A zipper makes removal easier for washing, but a straightforward sewn seam is faster if you plan to keep the cover on permanently.

Measuring and Cutting Your Fabric

Measure your cushion lengthwise, widthwise, and across its thickness. If your cushion is 16 inches long, 14 inches wide, and 4 inches thick, write those numbers down. Add half an inch to each measurement for seam allowance — the space where the needle goes through both layers. Your cutting dimensions become 17 inches by 14.5 inches.

Cut two pieces of fabric to these dimensions. Lay your fabric flat on a clean surface, use a measuring tape and a ruler or straight edge to mark the cutting lines with a pencil or fabric chalk, and cut slowly with sharp scissors. Dull scissors tear fabric instead of cutting it cleanly, which makes sewing harder later. If your fabric has a pattern or direction (like stripes or a nap), make sure both pieces face the same way so the finished cover looks even.

Pinning and Sewing Three Sides

Place your two fabric pieces together with the right sides facing inward — the pretty, printed, or finished side of the fabric should be on the inside, touching the other pretty side. The wrong side (the duller or blank side) faces outward. Pin along all four edges to hold the pieces together while you sew.

Sew three complete sides using a half-inch seam allowance. If you are using a machine, set it to a straight stitch and sew slowly. If you are hand-sewing, use a running stitch or backstitch, pushing the needle through both layers and pulling the thread snug after each stitch. Leave one entire side unsewn — this is your opening for inserting the cushion. Backstitch at the beginning and end of each seam to lock the thread so it does not unravel.

Turning the Cover Right-Side Out

Once three sides are sewn, trim the corners at a 45-degree angle about a quarter inch from the stitching. This removes bulk so the corners lie flat when you turn the cover over. Do not cut into the stitches themselves.

Reach into the unsewn opening and grab the fabric from inside. Pull gently and steadily until the cover turns right-side out through the opening. The seams are now on the inside where they belong, and the pretty side faces outward. Use a blunt tool like a wooden spoon handle to push the corners out fully so they are sharp and even. Press the cover with an iron on low heat if the fabric is wrinkled.

Inserting the Cushion and Closing the Opening

Slide your cushion into the cover through the open side. Smooth it so it sits evenly inside with no bunching or gaps. The cushion should fill the cover snugly but not so tightly that the seams strain.

Close the opening by hand using a ladder stitch (also called an invisible stitch), which hides the seam inside the fold of fabric. Fold the raw edges of the opening inward by half an inch and pin them closed. Thread a needle and knot the end. Bring the needle up through the fold on one side, cross to the opposite side, and run the needle inside the fold for about half an inch before bringing it back out. Cross back to the first side and repeat. Pull the thread snug every few stitches so the seam closes invisibly. Knot the thread on the inside when you reach the end.

Alternatively, you can sew the opening closed on a machine using a straight stitch, which is faster but leaves a visible seam. This works fine if the opening faces the back of the chair where it will not show.

Using a Zipper for straightforward Removal

If you want to remove the cover for washing, install a zipper in the opening instead of sewing it shut. Measure the opening length and buy a zipper that length or slightly longer — you can trim a metal zipper with scissors or a file, though plastic zippers are harder to cut.

Pin the zipper to the opening with the zipper teeth facing inward (toward the cushion). Sew along both sides of the zipper using a zipper foot attachment on your machine, or by hand with small stitches. The zipper foot lets the needle run close to the teeth without hitting them. Once both sides are sewn, the zipper is installed and the cover can open and close.

Finishing Touches and Care

If your seams are rough or frayed, trim any loose threads with scissors. Some fabrics fray more than others — if you are concerned, you can seal the raw edges inside the cover with a zigzag stitch on a machine, or leave them as they are if the fabric is stable.

Wash your finished cover in cool water on a gentle cycle if the fabric allows it, and air-dry it to avoid shrinkage. If you used a zipper, open it before washing so water can reach all the fabric. Iron on low heat if needed. A well-made cover lasts years and can be recovered with a new cushion when the foam compresses.

Frequently Asked Questions

Can I sew a cushion cover by hand if I do not have a sewing machine?

Yes. A hand needle and thread work perfectly well — it just takes longer, usually 2 to 4 hours depending on the cushion size. Use a backstitch or running stitch and keep your stitches small and even. The result is just as strong as a machine-sewn seam.

What fabric is best for a chair cushion cover?

Cotton, cotton blends, and linen are durable and straightforward to sew. Avoid stretchy fabrics like jersey or knit unless you have experience, because they slip under the needle. Upholstery fabric is thicker and holds up longer than quilting cotton, but it is harder to sew by hand.

How much seam allowance do I need?

Half an inch is standard and works for both hand and machine sewing. It gives you enough fabric to stitch without the seam falling apart, and it is not so wide that it wastes material or creates bulk at the corners.

What if my cushion is thicker than 4 inches?

Measure the actual thickness and add it to your length and width measurements. A 6-inch-thick cushion that is 16 by 14 inches needs fabric cut to 22 by 20 inches (adding 6 inches for thickness on both the front and back). The math is: length plus thickness plus thickness, width plus thickness plus thickness.

Can I use a pattern or print that has a direction?

Yes, but cut both fabric pieces so the pattern runs the same direction on each one. If you cut one piece upside down, the pattern will be backwards on one side of the finished cover. Lay both pieces on top of each other before cutting to make sure they match.