Gathers are bunched fabric held in place by a tight thread line
Gathers are folds of fabric compressed into a smaller space — usually along a seam or edge. You create them by pulling one or more long threads tight, which bunches the fabric between them. The gathered section then gets sewn to a flat piece (like a waistband or yoke) to hold the bunches in place. Gathers are common in skirts, sleeves, bodices, and ruffles because they add shape and movement without cutting away fabric.
You can make gathers by hand or machine. The machine method is faster and more even; the hand method gives you more control and works on delicate fabrics. Both start the same way: you sew long stitches along the line where you want the gathers, then pull the thread to bunch the fabric.
Key Takeaways
- Gathers are created by sewing long stitches, then pulling the thread tight to bunch the fabric between two anchor points.
- Use two parallel rows of long stitches (not one) so the fabric bunches evenly and the threads don't break under tension.
- Leave long thread tails at both ends of each row — at least 4 inches — so you have something to grip and pull.
- Once the gathers are bunched to the right width, sew the gathered edge to the flat piece with a normal stitch length to lock them in place.
- Remove the gathering threads after the final seam is sewn, or leave them in if they are buried inside the seam.
Sewing the gathering rows with a machine
Set your machine to the longest stitch length available — usually 4 to 5 millimeters. A longer stitch is easier to pull and less likely to break. Thread your machine normally and do not backstitch at the start or end of these rows; you need the thread tails loose so you can pull them.
Sew two parallel rows of stitches, about 1/4 inch apart, along the edge you want to gather. Both rows should run the full length of the section. The first row should sit about 1/4 inch from the raw edge; the second row sits 1/2 inch from the raw edge. Sew slowly and keep the rows as straight as possible. Leave at least 4 inches of thread hanging loose at both ends of each row.
Two rows distribute the tension and prevent the threads from snapping. If you use only one row, the thread often breaks as you pull, and you have to start over. The space between the rows also gives the fabric room to bunch without bunching too tightly in one spot.
Pulling the threads to create the bunches
Gently pull both thread tails on one end of the fabric. Pull evenly on both threads at the same time so the fabric bunches along both rows together. The fabric will compress and fold into tight waves. Keep pulling until the gathered section is as narrow as you need it to be — usually the width of the piece it will attach to (like a waistband or yoke).
Distribute the bunches evenly by sliding them along the threads with your fingers. If one section has larger folds than another, gently work the fabric along the threads until the gathers look balanced. Do not pull so hard that the threads snap; if a thread breaks, you lose all the gathers on that row and have to start over.
Once the gathers are the right width and look even, tie the thread tails together in a knot at both ends to hold the tension. The knots keep the bunches from relaxing while you sew the gathered edge to the flat piece.
Sewing the gathered edge to a flat piece
Place the gathered section and the flat piece right sides together, with the gathered edge facing the flat piece. Pin them together at the ends and middle, then add pins every inch or so. The pins hold the gathers in place and keep them from shifting as you sew.
Set your machine back to a normal stitch length (2 to 2.5 millimeters). Sew along the line where the gathers meet the flat piece, using the same seam allowance you used for the gathering rows (usually 1/2 inch). Sew slowly and watch the gathers as you go; if they bunch up unevenly under the presser foot, stop and adjust them with a pin.
This final seam locks the gathers in place. Once you finish, the bunches will not move or relax, even if you wash and dry the garment many times.
Removing the gathering threads
After the final seam is sewn, you can remove the gathering threads. Gently pull on one of the knots to loosen the threads, then slide them out from under the fabric. If the threads are stubborn, use a seam ripper to cut them in short sections and pull them out piece by piece.
If the gathering threads are buried inside the seam (between the gathered piece and the flat piece), you can leave them in. They will not show and removing them risks pulling out the final seam. Only remove them if they are visible on the outside of the garment.
Hand-sewing gathers for delicate or small sections
For lightweight fabrics, small areas, or when you want more control, you can gather by hand. Thread a hand-sewing needle and knot the end. Starting at one end of the section you want to gather, sew small running stitches (about 1/8 inch long) along two parallel lines, just as you would with a machine. Leave the thread tails long and loose.
Once both rows are sewn, gently pull the thread tails to bunch the fabric. Hand-sewn gathers often look softer and more delicate than machine gathers because the stitches are smaller and the bunches are less rigid. The trade-off is that hand sewing takes longer and the threads can still break if you pull too hard.
After the gathers are bunched and tied off, sew the gathered edge to the flat piece by hand using a whip stitch or backstitch. This method works well for heirloom sewing, children's clothes, and any project where you want a handmade look.
Troubleshooting common gathering problems
If the gathering threads break while you are pulling, you pulled too hard or used too short a stitch length. Start over with a longer stitch (5 millimeters or more) and pull more gently. If you are gathering a very long section, pull in stages — bunch it halfway, tie it off, then pull the rest of the way.
If the gathers look uneven after you sew them to the flat piece, the bunches shifted while you were sewing. Next time, use more pins (every 1/2 inch instead of every inch) and sew more slowly. If the gathers are too tight or too loose after sewing, you cannot fix them without removing the final seam and starting over, so take time to get the width right before you sew.
If the gathering threads are hard to see and remove, use a seam ripper or small scissors to carefully cut them into short sections. Pull out each section with tweezers. Work slowly so you do not accidentally cut the fabric or the final seam.
Frequently Asked Questions
Can I gather fabric on a serger?
Yes. Set the serger to a long stitch and sew along the gathering lines without cutting the fabric. Pull the threads to bunch the fabric, then use a regular machine or hand sewing to attach the gathered edge to the flat piece. A serger creates a finished edge at the same time, which is useful if the gathered section will be visible.
What if I only want gathers in one section, not all the way across?
Sew the gathering rows only along the section you want to gather, starting and stopping where you want the gathers to begin and end. Tie off the threads at both ends. The ungathered sections will stay flat while the gathered section bunches up.
How much fabric do I need to gather to fit a certain width?
Gathers usually take up about half the original width, but this varies by fabric weight and how tightly you pull. Test on a scrap first: cut a piece 10 inches wide, gather it, and measure how wide it becomes. Use that ratio to figure out how much fabric you need for your project.
Do I have to use two rows of gathering threads?
Two rows are strongly recommended because they distribute the tension and prevent thread breakage. One row works on very short sections (under 4 inches) or lightweight fabrics, but it is risky. Three or more rows are useful for very long sections or heavy fabrics, but two is the standard.
Can I gather knit fabric?
Yes, but knits are stretchy and the gathers may relax over time. Use a ballpoint needle and a longer stitch length to avoid snagging the fibers. Pull the gathering threads gently and tie them off securely. Wash and dry the garment before removing the gathering threads to see if they hold.