On a heavy wool coat, the buttonhole does more than hold a button. It announces how the coat was made. A machine buttonhole, useful as it is, can pucker on thick cloth, stretch out of shape, and look like a repair rather than a finish. The classic bound buttonhole takes longer, but it is quiet, flat, and strong. Two narrow lips of bias fabric meet at the opening, and the raw wool never appears at the edge. The method can feel fussy on paper, so work out the sequence on a practice sample before you cut into your coat front.
Photo by Joseph Sharp on Unsplash.
What You Need
- Wool or coating fabric for the practice sample
- Bias-cut lining or cotton lawn for the patch
- Matching thread
- Tailor’s chalk
- Small sharp scissors
- A hand-sewing needle
- A seam gauge
- An iron and press cloth
What a Bound Buttonhole Is
A bound buttonhole is a small framed window in the cloth. A rectangle is marked on the right side, a patch of bias-cut lining is stitched over it, and the centre of the rectangle is cut open. When the patch is drawn through to the inside, the two long edges become the lips that line the opening. The short ends are closed with tiny stitches. Because the patch is cut on the bias, it can be rolled into a neat fold without pulling the coat.
Step 1: Prepare a Practice Sample
Your first bound buttonhole should live on a scrap, not a sleeve. Use the same layers your coat will use: the wool coating, the interfacing, and any underlining. If you test on a single layer, the buttonhole will behave differently when it is stabilized by interfacing.
On the right side, draw a horizontal rectangle with tailor’s chalk. The long sides should equal the finished buttonhole length; the short sides should be about 6 mm apart. Wool coating can take a slightly wider window if you want a more visible lip, but start with a narrow one. Mark the rectangle clearly, because your needle will follow it. Use a seam gauge to check the two short sides; they should be identical.
Cut a patch of bias-cut lining or cotton lawn large enough to extend about 2 cm beyond the rectangle on all sides. The true bias runs at 45 degrees to the buttonhole line. Press the patch lightly; do not stretch it.
Photo by Liana S on Unsplash.
Step 2: Sew the Bias Patch in Place
Place the patch on the right side of the sample, right sides together, with the rectangle centred underneath. Pin through the middle first, then smooth outward. Because the patch is bias, it will want to twist; let it lie flat instead of pulling it straight. Baste around the rectangle with a loose thread, then remove the pins.
Thread a hand-sewing needle with a single strand of matching thread. Starting at the middle of one long side, work small running stitches or backstitches exactly on the drawn rectangle. The stitches should be close enough that the corners stay firm. At each corner, put one stitch exactly into the corner point. Do not take long stitches; you are making a seam that will be pulled and pressed. Remove the basting thread before you cut, so the scissors do not catch it.
Step 3: Cut the Window Open
With small, sharp scissors, cut along the centre of the rectangle from end to end, stopping about 6 mm from the short ends. You are cutting through both the wool and the patch. Now snip diagonally from each end of that centre cut to the corresponding corner of the rectangle. Do not cut past the drawn corner.
Turn the sample over. Gently push the patch through the opening to the wrong side, using your fingers or a blunt stiletto. Do not use the scissors point. The cut should open like a lined slit, and the little corner triangles should stay in place; they become the square ends of the buttonhole.
Step 4: Shape the Lips
From the right side, use your fingers to roll the two long edges of the patch until they form even lips. The seam line should sit at the very edge of each lip, not wander to the front or back. Work slowly; this is where the buttonhole earns its reputation. When the lips look even, press them from the right side with a dry iron and a press cloth. If the fabric needs steam, lift the iron rather than sliding it. Let the sample cool completely before moving it.
On the wrong side, the patch will appear as two wide flaps around the opening. Smooth them flat and catch them down with loose catch stitches, without stitching through to the outside. This holds the lips in place for the rest of the work.
Photo by Vitalii Kyktov on Unsplash.
Step 5: Reinforce the Corners
The last step is the one that makes a bound buttonhole last. From the wrong side, fold the little triangular flaps inward and work three or four tiny overcast stitches through the triangle, the lip, and the interfacing. These stitches should be nearly invisible from the right side.
Then, on the right side, work a short vertical bar of buttonhole or overcast stitches across the end of the lips, just catching the wool at each side. This bar holds the two lips together at the end and keeps the corner from stretching. Keep the bar small, no wider than the end of the opening, and do not pull it tight enough to pucker the wool.
Useful Mistakes to Avoid
The two most common problems are unequal lips and loose corners.
- Unequal lips. This almost always comes from a wandering seam line. Measure the rectangle again before cutting, and if the two long sides of the stitching are not identical, pull out the stitches and begin again. When you roll the lips, roll both sides together and compare them often.
- Loose, fragile corners. This comes from cutting the centre slit too close to the end line. Leave a small bridge at each end, snip diagonally to the corners, and leave the little triangle intact. The triangle is not waste; it is the reinforcement that holds the corner square.
- Stretched bias. Bias fabric can be pulled out of shape in a few seconds. Pin and baste without tension, and do not pull the patch through the opening with too much force.
- A bulky opening. If the finished buttonhole looks thick and clumsy, press it again with a cloth, roll the lips again, and then try a second sample with a slightly narrower window. Thick coating rewards patience, not force.
When the sample is right, you will know the sequence by heart. The same steps can then be repeated on the coat front with quiet confidence. A hand-sewn bound buttonhole is not the fastest finish, but it belongs on a tailored coat, and it will still be there long after faster finishes have frayed.