What a Blind Stitch Does and Why You Use It

A blind stitch is a seam that hides the thread inside the fold of fabric, so it looks invisible from the outside. On a sewing machine, the needle catches just a thread or two from the fold, then travels inside the fold itself before emerging to catch the opposite side. The result is a seam that holds two pieces together—usually hems, cushion closures, or appliqués—without visible stitching on either face of the fabric.

The blind stitch is different from a hand-sewn blind stitch, though the goal is the same. Machine blind stitches work best on medium to lightweight fabrics and on hems where you have folded fabric to work with. Heavier fabrics like denim or canvas can jam the presser foot or skip stitches because the fold is too thick for the needle to catch properly.

Key Takeaways

  • Your sewing machine must have a blind stitch setting—check your manual to find the stitch number, as it varies by brand.
  • Prepare fabric by folding the hem or seam allowance to the width you want, then pressing it flat with an iron so the fold holds its shape.
  • Use a blind stitch presser foot, which has a guide that keeps the needle positioned to catch only a thread from the fold.
  • Sew slowly and test on scrap fabric first, because skipped stitches and puckering are common when tension or fold thickness is wrong.
  • The needle should catch only one or two threads from the fold—if it goes deeper, the stitch will show on the outside.

Check Your Machine's Blind Stitch Setting

Not all sewing machines have a blind stitch, so the first step is to look at your manual or the stitch dial on your machine. Blind stitches are usually numbered in the 70s or 80s range, but the exact number depends on your brand and model. Brother machines often label it stitch 77 or 78; Janome and Juki machines may use different numbers. If you cannot find it in your manual, search online for "[your machine brand] blind stitch" plus the model number.

Once you locate the stitch, select it on your machine. You will also need to install the blind stitch presser foot, which looks different from a standard foot—it has a metal guide or blade that sticks up from the center. This guide is what keeps your needle in the right position to catch only the fold. If your machine did not come with a blind stitch foot, you can order one from the machine's manufacturer or from a sewing supply store; they cost between $15 and $40 depending on the brand.

Prepare Your Fabric and Fold the Hem

Before you sew, your fabric must be folded and pressed. For a hem, fold the raw edge up to the width you want—typically 0.5 inches for a narrow hem or 1 inch for a standard hem. Fold it again so the raw edge is hidden inside the fold, creating a double fold. Press the entire fold flat with an iron on a medium heat setting. The crease must be sharp and hold its shape, or the presser foot will not sit evenly and the stitch will skip.

For an appliqué or seam closure, fold the seam allowance to the inside and press it the same way. The fold should be crisp enough that it does not shift when you touch it. If your fabric is slippery (like silk or rayon), use a pressing cloth between the iron and the fabric to prevent shine marks, and let the fold cool completely before moving the fabric to the sewing machine.

Thread Your Machine and Adjust Tension

Thread your machine with thread that matches your fabric color. Use the same thread weight on the bobbin as on the top—usually all-purpose polyester or cotton thread. Wind the bobbin by hand or with your machine's automatic winder, and make sure it is wound evenly and not too tight, or the bobbin thread will break during sewing.

Blind stitch seams often pucker or skip stitches because the tension is too tight. Start with your tension dial set to a lower number than you use for regular straight stitches—usually around 3 or 4 instead of 5 or 6. You will test this on scrap fabric, so do not worry about getting it perfect now. If the top thread shows on the back of the seam, lower the tension further. If the bobbin thread shows on the front, raise it slightly.

Position the Fold Under the Presser Foot

Place your folded fabric under the blind stitch presser foot so the fold sits against the metal guide. The guide should run along the fold, and the needle should be positioned just to the left of the guide (or to the right, depending on your machine—check your manual). The fold must be straight and centered under the foot, or the needle will miss it entirely and sew into empty fabric.

Lower the presser foot lever to hold the fabric in place. Do not pull or push the fabric—the feed dogs will move it forward at the correct speed. If you force the fabric, you risk breaking the needle or bending it, which causes skipped stitches.

Sew Slowly and Test First

Start sewing at a slow speed—around 50 to 60 percent of your machine's maximum speed. The blind stitch requires the needle to move in and out of the fold repeatedly, and going too fast causes the needle to miss the fold or catch too much fabric. Use the speed control on your machine, or straightforward press the foot pedal gently instead of all the way down.

Before you sew your actual project, test on a scrap of the same fabric folded the same way. Sew 3 to 4 inches and then stop. Unfold the test piece and look at both sides. The stitches on the outside should be nearly invisible—just a tiny dot of thread where the needle caught the fold. If the stitches are large or visible, the needle is catching too much fabric, and you need to adjust the guide or reposition the fold. If stitches are skipped, lower the tension or slow down further.

Common Mistakes and How to Fix Them

The most common problem is visible stitches on the outside. This happens when the needle catches more than one or two threads from the fold. Check that the fold is positioned correctly against the guide, and make sure the guide itself is not bent or worn. If the guide looks damaged, you may need a new presser foot. Also check that your fabric is not too thick—if the fold is more than 0.25 inches thick, the needle cannot reach inside it properly.

Skipped stitches usually mean the tension is too tight or you are sewing too fast. Lower the tension by one number and try again. If that does not work, slow down to 40 percent speed and test on another scrap. Another cause is a dull or bent needle—replace it with a fresh needle before you assume the tension is wrong.

Puckering along the seam happens when the fabric is pulled or when the fold is not pressed flat enough. Re-press your fabric with a hot iron and make sure the crease is sharp. Also check that you are not pulling the fabric as you sew—let the machine do the work.

Frequently Asked Questions

Can I use a blind stitch on thick fabrics like denim?

Blind stitches work best on lightweight to medium fabrics. Denim and canvas are too thick—the fold will not fit under the presser foot, and the needle will bend or skip stitches. For heavy fabrics, use a regular straight stitch or a whip stitch by hand instead.

What if my machine does not have a blind stitch?

Not all machines have this stitch built in. Check your manual to be sure. If yours does not, you can sew a regular straight stitch close to the fold, or learn to hand-sew a blind stitch, which takes longer but works on any fabric. Some machines have a "ladder stitch" setting that is similar and may work for your project.

How do I know if my presser foot is positioned correctly?

The metal guide should run along the fold, and when you lower the presser foot, the needle should be just to the left of the guide (or right, depending on your machine). Sew a test line and check that the needle catches only a thread or two from the fold. If it catches more, reposition the foot slightly and test again.

Why does the thread keep breaking?

Thread breaks when the tension is too tight, the needle is bent, or the bobbin is wound too tightly. Check the needle first—replace it with a new one. Then lower the tension by one or two numbers and test. If the bobbin thread breaks, rewind it more loosely and make sure it is wound evenly.

Can I use a blind stitch to close a seam on a stuffed animal or pillow?

Yes, but you need to fold the seam allowance to the inside first and press it flat. Then position the fold under the presser foot and sew. This works well for closing openings on pillows and stuffed items because the stitch is hidden inside the fold.