What a shank button is and why it needs different stitching

A shank button has a hollow stem or loop on the back instead of holes drilled through the front. That stem is what you stitch through, not the button face itself. This design leaves a small gap between the button and the fabric, which matters because it gives the thread room to move without putting stress on the stitches every time you button and unbutton the garment.

Shank buttons are common on coats, blazers, and dress shirts because they sit more securely than flat buttons and look more finished. The hollow back also means you cannot use the same two-hole or four-hole stitching pattern you would for a regular button. You need to anchor the shank itself.

Key Takeaways

  • Thread goes through the shank loop on the back of the button, not through holes in the front.
  • You need thread, a needle, scissors, and a toothpick or matchstick to create the right spacing.
  • The stitch takes about five to eight passes through the shank to hold securely.
  • A thread shank — a small wrapped layer under the button — prevents the thread from fraying and adds durability.

Gathering your materials

You need thread that matches the button or the garment (thread color is a matter of preference, but matching the button is most common). Use the same weight thread as the original button if you can see it — usually all-purpose polyester or cotton. A needle with an eye large enough to fit your thread without doubling it over works best; a size 7 or 8 embroidery needle is ideal for most shank buttons.

A toothpick, matchstick, or thin nail placed under the button while you stitch creates the spacing you need. Scissors to trim the thread and a small piece of fabric or a garment to practice on will help you get the motion right before you work on something you care about.

Anchoring the thread and positioning the button

Knot the end of your thread. Bring the needle up through the fabric from the back, coming out right where you want the button to sit. Do not come up through the shank yet — come up through the fabric only, a quarter-inch away from where the button will be. This gives you an anchor point.

Place the button on the fabric with the shank facing up (the hollow loop pointing toward you). Lay the toothpick or matchstick flat across the top of the shank, perpendicular to it. This tool keeps the thread from pulling too tight and crushing the fibers. Now bring your needle up through the shank loop, over the toothpick, and back down through the shank and fabric in one motion.

Making the stitches through the shank

Repeat that motion — up through the shank, over the toothpick, down through the shank and fabric — five to eight times. Each pass should be in the same spot; you are building up thread in the shank, not spreading it around. Keep your tension even so the thread does not bunch or pull unevenly.

After your final pass, bring the needle to the surface of the fabric right next to the button, but do not go through the shank. You are now positioned to wrap the thread shank, which is the reinforcement layer that keeps everything from unraveling.

Wrapping the thread shank for strength

Remove the toothpick. Wrap the thread tightly around the threads under the button two or three times, going around the bundle of thread between the button and fabric. This wrapping is what holds the button securely and prevents the thread from fraying when the button gets heavy use.

After wrapping, bring the needle back down through the fabric, close to the button but not through the shank. You are now on the back side of the garment. Make a small stitch in place — go down and come back up in nearly the same hole — and then pass the needle under that loop before pulling tight. This is a backstitch knot, and it locks the thread so it will not unravel.

Finishing and trimming

Trim the thread close to the fabric, leaving about a quarter-inch tail. If you are worried about fraying, you can explore a tiny drop of clear nail polish or fabric glue to the knot on the back, but this is optional for most garments. Let it dry completely before wearing if you do.

Test the button by pulling it gently — it should not move or twist. If it does, you may need to add one or two more passes through the shank and wrap again. A well-sewn shank button will last through hundreds of uses.

Frequently Asked Questions

Can I sew a shank button the same way as a regular button?

No. Regular buttons have holes you stitch through; shank buttons have a hollow stem on the back. Stitching through a shank button's face will not work because there is nothing to stitch through. You must go through the loop on the back.

What if the shank is very thick or the button is very heavy?

Use heavier thread or double your thread (fold it in half and thread both ends through the needle). Make eight to ten passes instead of five to eight. A thicker thread shank wrapping also helps — wrap four or five times instead of two or three.

Do I have to use a toothpick?

No, but it helps. The toothpick creates a gap so the thread does not pull tight and weaken the fibers. Without it, you risk the button pulling away from the fabric over time. A matchstick, thin nail, or even a piece of stiff wire works the same way.

What if my thread keeps breaking while I am stitching?

Your thread may be too thin for the button weight, or your needle eye may be too small and fraying the thread as it passes through. Try a thicker thread or a needle with a larger eye. Pull with steady, even pressure rather than jerking the needle.

How do I know if the button is sewn securely enough?

Tug the button firmly — it should not move, twist, or feel loose. If it gives at all, add two more passes through the shank and wrap the thread shank again. A button that feels solid will stay put through regular wear.