Sewing bias binding is a two-step process: pin the binding to the fabric edge, then stitch it down

Bias binding finishes a raw edge with a neat, folded trim. The binding wraps around the edge of your fabric — one folded side stitches to the front, the other side folds to the back and stitches down by hand or machine. The whole job takes 30 minutes to an hour for a small project like a pillowcase or apron, longer for a quilt or garment.

You will need bias binding (pre-made or cut from fabric), thread that matches your project, a needle or sewing machine, pins, and scissors. A pressing tool like an iron helps crease the binding before you sew, but is not required. The binding itself does most of the work — your job is to hold it in place and stitch a straight line.

Key Takeaways

  • Pre-made bias binding comes folded in half already, so you unfold one side, pin it to the fabric edge, and stitch along the crease line.
  • The binding wraps around the edge, so the top fold stays on the front and the bottom fold flips to the back and stitches down separately.
  • Machine stitching on the front takes 15 to 20 minutes; hand stitching the back adds another 15 to 30 minutes depending on project size.
  • Corners require you to fold the binding at a 45-degree angle before continuing, which takes practice but becomes automatic after a few tries.
  • Pressing the binding with an iron before you sew makes it lie flat and straight, reducing puckering and crooked seams.

Preparing the binding and fabric edge

Start with a clean fabric edge. If your fabric is fraying, trim it with scissors or a rotary cutter so the edge is straight and even. Frayed fabric will bunch under the binding and create lumps.

If you are using pre-made bias binding, unfold it completely and lay it flat. You will see two fold lines running lengthwise — the binding was folded in half, then folded again. Open it all the way so it lies as a flat strip. If you cut your own bias binding from fabric, press it in half lengthwise with an iron so it has a center crease, then open it again.

Press the entire length of the binding with an iron set to medium heat. This removes wrinkles and makes the binding lie flat when you pin it. A wrinkled binding will twist as you sew and create puckers along the edge.

Pinning the binding to the front of the fabric

Lay your fabric flat on a table or ironing board. Take the pre-made binding and fold it in half lengthwise again — you are returning it to its original folded state. One folded edge will be slightly narrower than the other; this narrower fold is your guide.

Unfold the binding once so it opens into a long strip with a center crease. Align one raw edge of the binding with the raw edge of your fabric. The center crease of the binding should run parallel to the fabric edge. Pin every 2 to 3 inches along the length, keeping the binding straight and the fabric edge smooth.

At corners, stop pinning about 1 inch before the corner. Fold the binding at a 45-degree angle away from the corner, crease it with your finger, then fold it back toward the next edge. This creates a mitered corner. Pin the fold in place and continue pinning along the next edge. The fold will sit on top of the corner point.

Stitching the binding to the front by machine

Thread your machine with thread that matches your binding or your fabric — either works. Set the stitch length to 2.0 to 2.5 millimeters, a standard length for seaming. Sew along the crease line of the binding, the line that runs down the center of the unfolded strip. This crease is your stitching guide.

Start at a straight edge, not a corner. Sew slowly and keep the fabric edge aligned with the binding crease. Backstitch at the start and end to lock the thread. When you reach a corner, sew to the fold, stop with the needle down, lift the presser foot, and pivot the fabric 90 degrees. Lower the presser foot and continue sewing along the next edge.

Sew all the way around the edge. When you reach the starting point, overlap the binding by about 1 inch, then trim the excess and fold the end under so it meets the beginning neatly. Sew over the overlap to find it.

Folding and stitching the binding to the back by hand

Once the front is stitched, fold the binding to the back of the fabric. The folded edge of the binding should cover your machine stitching line and sit just past it. Pin the binding to the back every 2 to 3 inches so it does not shift while you sew.

Thread a needle with thread that matches the binding. Use a slip stitch, also called a ladder stitch, to sew the binding down invisibly. Bring the needle up through the fold of the binding, then insert it directly across into the fabric just below the binding. Slide the needle through the fabric for about 1/8 inch, then come back out and go back into the binding fold. Repeat this motion all the way around.

The slip stitch hides inside the fold of the binding, so your stitches do not show on the back of the fabric. Work slowly and keep your stitches small and even. At corners, sew right through the fold without skipping stitches — the corner will lie flat on its own.

Machine stitching the binding to the back

If you prefer to sew the back by machine, fold the binding to the back and pin it as described above. Thread your machine with matching thread and set the stitch length to 2.0 millimeters.

Sew along the inner edge of the binding, the edge closest to the fabric. This seam will be visible on the back, so keep it straight and even. Sew slowly around corners and backstitch at the start and end. This method is faster than hand stitching but creates a visible seam on the back of your project.

Fixing common problems

If the binding puckers or bunches, the fabric edge was likely frayed or the binding was not pressed flat before sewing. On small puckers, you can press the finished edge with an iron to flatten it. On large puckers, you may need to remove the stitches, re-press the binding, and sew again.

If the binding twists or does not lie flat, it was probably pinned unevenly or the fabric edge was not straight. Check that the binding is aligned with the fabric edge before you sew, and pin more frequently — every 1 to 2 inches instead of every 3 inches — to keep it from shifting.

If your corners do not lie flat, the 45-degree fold may not be sharp enough. Crease the corner fold firmly with your fingernail or the edge of a ruler before pinning. A crisp crease makes the corner sit neatly without bulk.

Frequently Asked Questions

Can I sew bias binding on a curved edge?

Yes. Bias binding is designed to curve because the fabric is cut on the bias, which stretches slightly. Pin more frequently on curves — every 1 inch instead of every 3 inches — to keep the binding from bunching. Sew slowly and let the binding ease around the curve naturally without pulling.

What if my binding is too wide or too narrow?

Pre-made binding comes in standard widths: 1/2 inch, 3/4 inch, and 1 inch are most common. If the width does not suit your project, you can cut your own bias binding from fabric using a rotary cutter and ruler. Cut strips at a 45-degree angle to the grain, then sew them together end-to-end and press them in half.

Do I have to hand stitch the back, or can I use the machine for both sides?

You can machine stitch both sides. The back seam will be visible, but it is faster and just as durable. Some sewers prefer the invisible hand-stitched back for garments and the machine-stitched back for quilts and home goods where the back is less visible.

How do I join two pieces of binding together?

Lay the two ends at a right angle, overlapping by about 1/2 inch. Draw a diagonal line from corner to corner across the overlap, then sew along that line. Trim the excess and press the seam open. This creates a diagonal seam that is less bulky than a straight overlap.

Can I use regular fabric strips instead of bias binding?

Yes, but they will not curve as smoothly. Bias-cut strips stretch slightly because the threads run at a 45-degree angle, which lets them ease around curves and corners. Straight-cut strips are stiffer and may pucker on curves or at corners. Bias binding is worth using for curved edges; straight strips work fine for straight edges only.