The ladder stitch closes seams invisibly from the inside

A ladder stitch (also called a hidden stitch or invisible stitch) runs thread through the fold of fabric on both sides of an opening, so the thread never shows on the outside. The result looks like the seam was never opened. You use it to close stuffed animals, pillows, cushions, and seams you've opened to turn fabric right-side out — anywhere you need the closure to vanish.

The stitch works because thread travels inside the fold of the fabric edge rather than across it. When you pull the thread tight at intervals, the fabric edges draw together and the thread disappears into the fold. It takes practice to keep tension even, but the method itself is straightforward.

Key Takeaways

  • Thread a needle with a single strand about 18 inches long and knot one end; longer thread tangles, shorter thread means more knots.
  • Start by bringing the needle out through one folded edge, then slide it through the opposite fold for about a quarter inch before bringing it back out.
  • Alternate sides with each stitch, keeping stitches small and close together so the thread stays hidden inside the folds.
  • Pull the thread snug every three or four stitches to draw the fabric edges together, but not so tight that you pucker the seam.
  • Finish by taking two small stitches in place at the end, then running the needle through the fold before cutting the thread.

Thread length and needle choice matter for speed and strength

Use a single strand of thread about 18 inches long. Longer thread tangles as you work; shorter thread means you'll tie on a new strand more often. A standard sewing needle works fine — size 7 or 8 for most fabric weights. If you're working with heavy fabric like canvas or denim, a size 5 or 6 needle will push through more easily.

Knot one end of the thread. The knot should be small and tight so it doesn't slip through the fold when you start. If your knot is loose, tie it twice. You'll hide this knot inside the fold at the start, so size doesn't matter for appearance.

Position the opening and anchor your first stitch

Lay the fabric flat with the opening facing you. The two edges you're closing should have a fold or hem already — this is where the thread will hide. If the edges are raw (cut), fold them inward about a quarter inch and press them flat with your fingers or an iron before you start.

Bring the needle up through the fold of one edge, about a quarter inch from the end of the opening. Pull the thread until the knot catches inside the fold. This anchors your thread so it won't slip out as you work. Take one small stitch in place at this spot to find it further.

Slide the needle through the fold and alternate sides

Bring the needle out of the first fold and insert it directly across into the fold of the opposite edge. Slide the needle through the fold (not through the fabric itself) for about a quarter inch, then bring it back out. The thread stays inside the fold the whole time.

Go back to the first side. Insert the needle into the fold right next to where you just came out, slide it a quarter inch forward, and bring it back out. Alternate sides this way, making small, even stitches. Keep the stitches close together — no more than a quarter inch apart — so the thread doesn't show on the outside.

As you work, the thread will be visible on the outside of the fabric between stitches. This is normal. The thread disappears when you pull it tight.

Pull the thread tight every few stitches to close the gap

After every three or four stitches, gently pull the thread. The fabric edges will draw together and the thread will vanish into the folds. Pull just enough to close the gap — if you pull too hard, you'll pucker the seam and create a visible dimple.

The tension should feel snug but not strained. If the seam starts to look bunched, you've pulled too tight. Loosen it slightly by pushing the fabric back along the thread with your fingers, then continue stitching with lighter tension.

Finish the seam and hide the final knot

When you reach the end of the opening, take two small stitches in place at the same spot to lock the thread. Then run the needle through the fold for about an inch without coming back out. Bring the needle out, pull the thread snug, and trim it close to the fabric. The thread end will slip back into the fold and disappear.

If you have leftover thread to tie on, repeat the process: knot the new thread, hide the knot in the fold, and continue stitching. The knots will all be hidden inside.

Common mistakes and how to avoid them

The most common error is stitching through the fabric itself instead of sliding through the fold. If you push the needle all the way through both layers, the thread will show on the outside. Keep the needle inside the fold at all times — think of the fold as a tunnel the needle travels through.

Uneven tension is the second mistake. If you pull hard on some stitches and light on others, some parts of the seam will close while others stay gapped. Work at a steady pace and pull with the same pressure each time. It's better to pull too gently than too hard.

Stitches that are too far apart will also show the thread. Keep them a quarter inch or less. Closer stitches take longer but look much cleaner, especially on lightweight fabrics.

Frequently Asked Questions

Can I use a ladder stitch on seams that don't have a fold?

No — the stitch only works if the fabric edges are folded. If you have raw edges, fold them inward a quarter inch and press them flat first. This creates the fold the needle needs to travel through. Without the fold, the thread will show on the outside.

What if my thread keeps showing between stitches?

Your stitches are too far apart or your tension is too loose. Bring the stitches closer together (aim for a quarter inch or less) and pull the thread a bit tighter every few stitches. The thread should disappear as soon as you pull.

How do I fix a ladder stitch that went wrong?

If the thread shows or the seam is puckered, use a seam ripper to cut and remove the stitches, then start over. It's faster than trying to fix it stitch by stitch. Press the fabric flat again and begin with fresh thread.

Can I use a ladder stitch on thick fabrics like canvas?

Yes, but use a smaller, stronger needle (size 5 or 6) and shorter thread lengths so you don't strain your hand. The stitches will take more effort to push through, but the method is the same. Pull the thread gently to avoid breaking it.

Do I need to backstitch at the end?

No. Two stitches in place at the end, followed by running the needle through the fold, is enough to lock the thread. Backstitching would create visible bumps and is unnecessary with this method.