A blind hem is a stitch that closes a fold of fabric so the thread stays hidden inside

A blind hem is a hand-sewn seam that closes the opening in a folded edge—usually at the hem of pants, skirts, or dresses—so the stitches are invisible from the outside. The thread runs inside the fold of fabric rather than across it, which is why the seam disappears when you wear the garment. This stitch works best on woven fabrics like cotton, linen, and wool; it is harder to control on stretchy knits.

The blind hem takes about 15 to 20 minutes per garment once you have the technique down, and it requires only a needle, thread, and scissors. You will need to prepare the hem first by folding and pressing it, then you stitch from inside the fold. The most common mistake is pulling the thread too tight, which puckers the fabric and makes the hem visible from the outside.

Key Takeaways

  • Press your hem fold with an iron before you start sewing so the fabric holds its shape and the stitch line stays straight.
  • Thread your needle with a single strand about 18 inches long, and knot one end so it does not slip through the fabric.
  • The stitch alternates between the fold and the garment body: one tiny stitch inside the fold, then one tiny stitch in the garment just below the fold, repeated along the entire hem.
  • Keep your tension loose enough that the thread does not show on the outside; if you see puckering, you are pulling too hard.
  • Finish by knotting the thread inside the fold and trimming the excess so no thread tail shows.

Prepare the hem by folding and pressing

Before you thread a needle, the hem must be folded and creased so it holds its shape while you work. Fold the raw edge of the fabric up to the inside of the garment by about half an inch, then fold it up again by the full hem width you want—usually 1 to 2 inches for pants or skirts. Press the fold flat with an iron on medium heat for 10 to 15 seconds so the crease sets into the fabric.

The pressed fold is your guide line. It keeps the hem straight and even, and it prevents the fabric from shifting while you stitch. If the fold is not crisp, the hem will wander and your stitches will be uneven. Let the fabric cool for a few seconds after pressing so the crease stays in place.

Thread the needle and knot the end

Cut a length of thread about 18 inches long—long enough to sew 6 to 8 inches of hem before you run out. Use thread that matches your fabric color so any visible stitches blend in. If you cannot find an exact match, choose a shade slightly darker rather than lighter, because thread looks lighter once it is sewn.

Thread the needle and pull the thread so one end is about 4 inches shorter than the other. Tie a knot at the longer end by wrapping the thread around your finger twice, rolling it off, and pulling tight. The knot should be about the size of a pea—large enough to catch in the fabric but not so large that it leaves a visible bump.

Start the stitch by anchoring the thread in the fold

Bring the needle up through the fold of the hem from the inside, about 1 inch from where you want to start stitching. Pull the thread until the knot catches inside the fold—it should be hidden between the two layers of fabric. This is your anchor point.

Slide the needle along inside the fold for about 1 inch, then bring it back out through the fold. You are now at your starting point. The thread runs inside the fold and does not show on the outside yet. This anchor stitch prevents the thread from unraveling if you pull on the hem later.

Stitch by alternating between the fold and the garment body

The blind hem stitch is a straightforward back-and-forth between two layers. Start by taking a tiny stitch—about 1/8 inch—inside the fold of the hem. Push the needle in and out of the fold so the thread stays hidden. Then when ready take a tiny stitch in the garment body, just below the fold line, catching only 2 to 3 threads of fabric so the stitch does not show on the outside.

Return to the fold and repeat: one stitch inside the fold, one stitch in the garment below. Keep the stitches small and evenly spaced, about 1/4 inch apart. The rhythm is fold-garment-fold-garment. Work slowly and keep the thread loose—you should be able to slide your fingernail under the thread without resistance. If the thread is tight, the fabric will pucker and the hem will be visible.

Continue along the entire hem length. Stop every 6 to 8 inches to rethread the needle when the thread runs short. Do not try to stitch with a thread longer than 18 inches, because long threads tangle and break.

Finish by knotting the thread inside the fold

When you reach the end of the hem, take one final stitch inside the fold. Bring the needle out through the fold, then wrap the thread around the needle twice and push the needle back through the fold close to where it came out. Pull the thread tight so the wraps cinch and form a knot inside the fold.

Slide the needle along inside the fold for about 1 inch, then bring it out and trim the thread close to the fabric. The knot and thread tail stay hidden inside the fold. Gently tug on the hem from the outside to make sure the stitches hold and do not slip.

Common mistakes and how to avoid them

The most common error is pulling the thread too tight, which causes the fabric to bunch and makes the hem visible from the outside. Keep the thread loose enough that you can slide your fingernail under it. If you see puckering after you finish a section, go back and loosen those stitches by gently tugging on the thread from the inside.

Another mistake is taking stitches that are too large or too far apart. Small, close stitches hold better and are less likely to catch on things. Aim for stitches about 1/4 inch apart. If your stitches are uneven or crooked, the hem will look wavy. Slow down and use the pressed fold line as your guide.

Do not stitch through all the layers of fabric when you take the stitch in the garment body. Catch only 2 to 3 threads so the needle does not poke through to the outside. If you go too deep, the stitch will show on the front of the garment.

Frequently Asked Questions

Can I use a blind hem stitch on stretchy fabrics like jersey or knit?

Blind hem works on knits, but it is harder to control because the fabric stretches as you pull the thread. Use a single strand of thread and keep tension very loose. Alternatively, use a ballpoint needle, which slides between fibers rather than piercing them, and reduces puckering on stretchy fabric.

What if I accidentally stitch through to the outside of the garment?

If a stitch shows on the front, carefully pull the thread out with tweezers and re-stitch that section. Take shallower stitches—catch only the very edge of the garment fabric, not the full thickness. If the hole is visible after you remove the thread, a tiny dab of fabric glue inside the fold can help the layers stick together.

How do I fix a blind hem that came loose after washing?

Rethread the needle and re-stitch the loose section, overlapping your new stitches with the old ones by about 1 inch on each side. This anchors the new thread to the existing seam. Wash the garment in cold water and lay it flat to dry so the stitches do not stretch.

Can I use a blind hem stitch on curved hems like armholes or necklines?

Yes, but work more slowly on curves because the fabric is more likely to pucker. Take even smaller stitches—about 1/8 inch apart—and keep the thread very loose. Press the curve with an iron before you start so the fold holds its shape.

What thread weight should I use for a blind hem?

Use all-purpose sewing thread, which is thin enough to hide inside the fold but strong enough to hold the hem. Avoid thick thread like embroidery floss, which is too bulky and will show. Match the thread color to your fabric, or go one shade darker if an exact match is not available.