What a Blind Hem Is and Why You'd Use It

A blind hem is a stitch that closes the fold of fabric—usually at the bottom of pants, skirts, or dresses—so the thread and stitches are hidden inside the fold. When you wear the garment, someone looking at it sees only the hem edge, not the thread. It's the standard finish for dress pants and formal wear, and it's one of the most useful repairs you can do by hand.

You use a blind hem when you're hemming a garment for the first time, letting out or taking in an existing hem, or repairing a hem that's come loose. The stitch itself takes about 10 to 15 minutes once you understand the motion, and it requires only a needle, thread, and scissors.

Key Takeaways

  • A blind hem stitch hides the thread inside the fold of fabric so the hem is invisible from the outside.
  • You catch only one or two threads of the garment fabric with each stitch, then slide the needle through the fold—this is what makes the stitch "blind."
  • Thread color should match the garment, and you should use a single strand of thread, not doubled.
  • The stitch works best on woven fabrics like cotton, linen, and wool; it's harder on stretchy knits.
  • Pinning the hem in place and pressing it with an iron before you stitch makes the work faster and neater.

Preparing the Hem Before You Stitch

Start by deciding how deep your hem should be. For most garments, a 1.5-inch hem is standard—that's the distance from the fold (the bottom edge of the garment) up to where the stitches will be. Mark this line with tailor's chalk or a fabric pencil, or use pins placed horizontally across the garment at that height.

Fold the fabric up along your marked line so the wrong side (the inside) of the garment faces you. Press this fold with an iron on medium heat—a crisp fold makes the stitch much easier to control. If your hem is longer than 1.5 inches, fold the raw edge (the cut edge) up about 0.5 inches and press that too, so you have a neat, enclosed hem. This step is optional but makes the hem look more finished on the inside.

Pin the hem in place every 2 to 3 inches around the entire garment, pushing pins through both layers so the fold stays put. Remove the pins as you stitch, one at a time.

Threading the Needle and Starting the Stitch

Cut a length of thread about 18 to 24 inches long—longer than that and it tangles; shorter and you'll run out mid-hem. Use thread that matches the garment color as closely as possible. Thread a needle and tie a single knot at the end; do not double the thread.

Start at a seam or an inconspicuous spot. Slide the needle through the fold of the hem (not through both layers—just inside the fold itself) for about 0.5 inches, then bring the needle out. This hides your starting knot inside the fold. Take one small stitch into the garment fabric just above the fold, catching only one or two threads of the outer fabric. The stitch should be so small you can barely see it.

Now slide the needle back into the fold, directly across from where you just came out. Slide it along inside the fold for about 0.5 inches, then bring it back out. Take another tiny stitch into the garment fabric, again catching only the surface threads. Repeat this motion all the way around the hem.

The Rhythm of the Blind Hem Stitch

The blind hem stitch has a steady rhythm: stitch into the garment, slide through the fold, stitch into the garment, slide through the fold. Each stitch into the garment should be no more than 0.25 inches long, and each slide through the fold should be about 0.5 inches. The smaller your stitches into the garment, the less visible they will be.

Keep your tension loose—not so loose that the thread dangles, but not so tight that you pucker the fabric. If you pull too hard, the hem will bunch and the garment will sit unevenly. A good test is to hold the garment up to the light after every few stitches and check that the hem hangs straight.

Work slowly at first. Speed comes after you've done a few hems and your hands know the motion without thinking. Most people find a rhythm of about one stitch per second once they're comfortable.

Finishing the Hem and Checking Your Work

When you reach the end of the hem, take two small stitches in the same spot to lock the thread, then slide the needle through the fold one last time and bring it out about 1 inch away. Trim the thread close to the fold so the end disappears inside. The knot will be hidden in the fold and won't show.

Try on the garment and check that the hem hangs evenly all the way around. Look at it from the outside—you should see only the fold of fabric, not any thread. From the inside, you'll see small, evenly spaced stitches. If a section of the hem is loose, you can add a few extra stitches in that spot without taking out the whole hem.

Press the finished hem with an iron on medium heat to set the stitches and remove any wrinkles from the fold. This also helps the hem sit flat against the garment.

Common Mistakes and How to Avoid Them

The most common mistake is catching too much fabric when you stitch into the garment. If you grab a large piece of fabric instead of just the surface threads, the stitch will show on the outside. Practice catching only one or two threads—your needle should barely dent the fabric. If you do catch too much, straightforward take out that stitch and try again.

The second mistake is pulling the thread too tight. This puckers the hem and makes it sit unevenly. Keep tension loose and even. If you notice puckering as you work, go back and loosen a few stitches.

The third mistake is using thread that's too thick or the wrong color. Use regular sewing thread, not embroidery thread or heavy-duty thread. Match the color to the garment as closely as you can—a thread that's slightly darker than the fabric is less visible than one that's lighter.

When to Use a Blind Hem Stitch and When Not To

A blind hem stitch works best on woven fabrics like cotton, linen, wool, and blends. It's the standard for dress pants, skirts, and formal wear. It also works on heavier fabrics like denim and canvas, though the stitch takes longer because the fabric is thicker.

A blind hem stitch is harder on stretchy knits like jersey or lycra because the fabric moves as you stitch, making it difficult to keep stitches even. For knit garments, a ladder stitch (also called a mattress stitch) often works better, though that's a different technique. If you're hemming a knit and want to use a blind hem, stabilize the hem with a strip of fusible interfacing first—this keeps the fabric from stretching as you work.

Frequently Asked Questions

How long does it take to sew a blind hem by hand?

A typical pair of pants takes 15 to 30 minutes, depending on how long the hem is and how fast you work. A skirt or dress may take 20 to 45 minutes. Speed improves with practice—your first hem will take longer than your fifth.

Can I use doubled thread to make the stitch stronger?

No. Doubled thread makes the stitch thicker and more visible from the outside. A single strand is strong enough for a hem that will last years. If you're worried about durability, use a slightly heavier-weight thread instead, but keep it single.

What if I can't match the thread color exactly?

Choose a thread that's slightly darker than the garment rather than lighter—dark thread is less visible against fabric. If you're hemming a print or plaid, pick a color that appears in the pattern. For very light fabrics, clear or smoke-colored thread also works well.

Do I have to press the hem before I stitch?

Pressing is not required, but it makes the work much easier and the hem looks neater. A crisp fold gives you a clear line to follow and keeps the fabric from shifting as you stitch. If you skip pressing, work slowly and pin more frequently.

What should I do if I make a mistake in the middle of the hem?

If a stitch is too visible or too tight, straightforward pull the thread out with your needle and redo that section. You don't have to remove the entire hem. If the mistake is small, you can often just add a few extra stitches nearby to reinforce the area.