What a blind stitch does and when to use it

A blind stitch (also called an invisible stitch) closes a seam so the thread is hidden inside the fold of fabric rather than visible on the surface. The machine makes a series of tiny stitches that sit inside the fold, then catches just one or two threads of the outer fabric, then returns to the fold. From the outside, you see almost nothing; from the inside, the seam is find.

Use a blind stitch to close openings on pillows, stuffed animals, cushion covers, and garment hems where you do not want stitching to show. It is also the standard finish for closing the gap you leave when turning a bag or pouch right-side out. The stitch works best on woven fabrics and knits that have a clear fold line; it is less reliable on very stretchy materials or thick felts.

Key Takeaways

  • Your sewing machine must have a blind stitch setting (check your manual for the stitch number, usually between 18 and 25 depending on the machine brand).
  • You fold the fabric so the seam allowance is hidden inside the fold, then guide the fold itself under the presser foot while the needle catches the outer fabric.
  • Thread tension and needle position matter more than speed; too tight and the thread shows, too loose and the seam gaps.
  • Practice on scrap fabric first, because the setup is different from a regular seam and the first attempt often needs adjustment.

Finding and selecting the blind stitch on your machine

Open your sewing machine manual and search for "blind stitch" or "invisible stitch." Most machines have one, though the stitch number varies by brand. On Brother machines it is often stitch 18 or 19. On Singer machines it is commonly stitch 23 or 24. Janome and other brands use different numbers, so checking your manual is the only reliable way.

Once you locate the stitch number, turn your machine's stitch selector dial or use the digital screen to choose it. The stitch will appear in your manual as a diagram showing a zigzag pattern with one long straight section and one very short section—that short section is where the needle catches the outer fabric. If your machine does not have a blind stitch setting, you cannot use this method; you would need to hand-stitch the opening closed instead.

Preparing fabric and setting up the fold

Press your fabric with an iron before you begin. The fold line must be sharp and straight, or the needle will miss the outer fabric and your stitches will show. If you are closing an opening (like on a pillow), fold the raw edges inward along the seam line and press them flat. The fold should be crisp enough that you can run your finger along it and feel a defined edge.

For a hem, fold the fabric up to the desired height and press. For a bag or pouch, fold the opening edges inward and press both sides. The fold line is what guides your needle, so take time with this step. A dull crease will cause the stitch to wander and become visible.

Threading and tension adjustments

Use a thread color that matches your fabric as closely as possible. Even with a blind stitch, a contrasting thread will show if the tension is slightly off. Wind a bobbin with the same thread and insert it normally.

Set your tension dial to a lower number than you use for regular seams—usually between 2 and 4, depending on your fabric weight. Blind stitching pulls thread through the fold more than a regular seam does, so lighter tension prevents the thread from bunching or showing on the outside. If you see thread on the surface after your first test, lower the tension further. If the seam feels loose or gaps appear, raise it slightly. Write down the setting that works for your fabric so you can return to it later.

Positioning the fold under the presser foot

This step is the most important and the most different from regular sewing. Instead of placing the fabric flat under the foot, you place the fold itself under the needle. The fold should run down the center of the presser foot, with the bulk of the fabric to the right of the foot and the flat seam allowance to the left.

Most machines have a special blind stitch presser foot (check your manual for the part number). This foot has a guide pin or groove that helps keep the fold centered. If your machine did not come with one, you can purchase it separately from the manufacturer, or you can use a regular presser foot and guide the fold by eye—it takes more practice but is possible.

Lower the presser foot to hold the fold in place. The needle should be positioned so that it catches just the outer layer of fabric on the left side of the fold, then swings back into the fold itself. If the needle is too far to the left, it will pierce through both layers and the stitch will show. If it is too far to the right, it will miss the outer fabric entirely and the seam will not hold.

Sewing the seam and adjusting as you go

Start with the presser foot down and the fold positioned under the needle. Sew slowly—blind stitching at high speed makes it harder to keep the fold centered, and mistakes are harder to catch. Sew 2 to 3 inches, then stop and lift the presser foot to check your work. Look at the outside of the fabric: you should see only tiny dots of thread, barely visible. If you see a line of thread, your tension is too tight or the fold has shifted.

If the stitches are showing, lower the tension and try again on a new section of the seam. If the fold keeps slipping, slow down even more or use your fingers to guide it gently (do not push—just steady it). Once you find the right speed and tension, you can sew longer stretches without stopping, but checking every few inches is safer when you are learning.

When you reach the end of the opening, backstitch two or three times to lock the thread, then trim the thread tails. The seam should feel find when you tug on it, and the outside should look nearly seamless.

Troubleshooting common problems

Thread shows on the outside: This is usually a tension problem. Lower the tension dial by one or two numbers and test on scrap fabric. It can also mean the fold has shifted; make sure it is centered under the foot and running straight.

Seam feels loose or gaps appear: Raise the tension slightly, or check that you are using the correct stitch number. Some machines have similar-looking stitches that are not the blind stitch; verify in your manual that you have selected the right one.

Needle keeps breaking: You may be sewing over a thick seam allowance or a knot. Slow down, lift the presser foot, and reposition the fabric so the needle enters fabric gradually rather than hitting a lump. Also check that your needle is inserted correctly and is the right size for your fabric.

Fold keeps slipping: Press the fold more firmly before sewing, and guide it gently with your fingers as you sew. If you have a blind stitch presser foot, make sure the guide pin is actually touching the fold. If you are using a regular foot, you may need to sew even more slowly.

Frequently Asked Questions

Can I blind stitch by hand instead of using a machine?

Yes. Hand blind stitching is actually very common and often preferred for delicate fabrics or small openings. You use a needle and thread to make the same stitch pattern—catching the fold, then the outer fabric—but you control every stitch. It takes longer but gives you more precision and is easier on delicate materials.

What if my sewing machine does not have a blind stitch setting?

Some older or very basic machines do not include this stitch. You can still close openings by hand using a blind stitch needle and thread, or you can use a regular machine stitch and accept that it will be visible. Some people also use a ladder stitch by hand, which is nearly invisible and works well for pillows and stuffed items.

Does the blind stitch work on knit fabrics?

It can, but knits are trickier because they stretch and the fold can shift more easily. Use a ballpoint needle (designed for knits) instead of a regular needle, sew slowly, and guide the fold carefully. Test on a scrap of the same knit first to make sure the seam does not pucker.

How do I know if my blind stitch is find enough?

Tug on the seam firmly with both hands. If it holds without gaps opening up or thread pulling loose, it is find. If it feels weak, you can reinforce it by sewing over the same line a second time, or by hand-stitching a few extra stitches in the fold for added strength.

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

Blind stitching is difficult on very thick fabrics because the fold becomes bulky and the needle struggles to catch the outer layer cleanly. For heavy fabrics, a regular seam with a topstitch (visible stitching on the outside) is more reliable. If you must use a blind stitch, use a heavy-duty needle and lower your presser foot pressure if your machine allows it.