Lace-to-lace seams need a different approach than fabric to fabric
Sewing lace to lace is not the same as sewing two pieces of regular fabric together. Lace is open and delicate — it has no grain line, it stretches unevenly, and a standard seam will pucker, tear, or show thread through the holes. The goal is a seam that lies flat, stays flexible, and does not damage the lace structure itself.
The best method depends on whether you are joining two pieces edge-to-edge or overlapping them. Edge-to-edge seams work best with a narrow zigzag or a rolled hem. Overlapped seams — where one piece sits on top of the other — let you use a straight stitch and are often stronger and easier to control.
Key Takeaways
- Use a size 60 or 70 needle and polyester or silk thread, both of which are thinner and less likely to snag or break delicate lace fibers.
- Overlap the lace pieces by at least one-quarter inch so the seam sits on solid lace, not just the open holes.
- Stabilize the lace with tear-away or water-soluble stabilizer on the underside to prevent puckering and keep the seam straight.
- Test your stitch length and tension on a scrap of the same lace before sewing the actual pieces.
- A narrow zigzag (width 1.5 to 2.0, length 1.5 to 2.0) or a straight stitch at 2.0 to 2.5 length works better than a standard seam.
Prepare the lace and choose your needle and thread
Start by cutting your lace pieces straight and true. Use a rotary cutter and ruler if the lace has a clear pattern; if the pattern is random or the edge is scalloped, cut along the scallop or a natural line in the design. Crooked edges will not line up, and you will spend the whole seam fighting the lace instead of sewing it.
Switch to a size 60 or 70 needle — these are much finer than a standard 80/12 needle and will pass through lace without snagging or creating holes. A needle that is too thick will leave visible punctures and can catch and break the delicate threads that make up the lace pattern.
Use polyester or silk thread rather than cotton. Both are smoother and thinner, so they slide through the lace without resistance. Cotton thread is thicker and more likely to pucker the lace or catch on the fibers. Match the thread color to the lace, or go one shade darker — thread that is too light will show in the holes.
Overlap the lace pieces for a stronger, easier seam
The overlapped method is the most forgiving for lace-to-lace work. Lay one piece of lace on top of the other, overlapping by at least one-quarter inch. The overlap should sit on solid lace — not just the open holes — so the needle has something to anchor into. If your lace is very open or has large motifs, overlap by one-half inch instead.
Pin the pieces together with the pins perpendicular to the seam line, spacing them about one inch apart. Use fine, thin pins (size 28 or smaller) so they do not leave holes. Pin from the top, and remove each pin just before the needle reaches it.
Sew a straight stitch down the center of the overlap, using a stitch length of 2.0 to 2.5. This length is longer than a standard seam (which is usually 1.5) and reduces the number of needle holes in the delicate lace. Sew slowly and keep your hands relaxed — do not pull or push the lace, and do not hold it tight. Let the feed dogs move the fabric.
Use stabilizer to prevent puckering and keep the seam straight
Lace will pucker if the seam is too tight or if the fabric is not supported underneath. Place a piece of tear-away stabilizer under the lace before you sew. Tear-away stabilizer is a thin, stiff paper that you pin or baste to the underside of the seam. It keeps the lace from stretching and puckering as the needle goes through.
After you finish sewing, carefully tear away the stabilizer. Tear it in small pieces, pulling at a low angle so you do not disturb the seam. If you used water-soluble stabilizer instead, rinse it away with cool water and let the seam dry flat.
If you do not have stabilizer on hand, you can use a piece of tissue paper or even a thin cotton fabric as a temporary backing. The goal is just to give the lace something solid to rest on while you sew.
Edge-to-edge seams with a narrow zigzag
If you need the seam to be less visible — for example, on a sheer overlay or a lace trim — use an edge-to-edge method with a narrow zigzag stitch. Butt the two lace edges together so they touch but do not overlap. Place stabilizer underneath both pieces.
Set your machine to a narrow zigzag: width 1.5 to 2.0, length 1.5 to 2.0. The stitch should swing from one side of the seam to the other, catching a few threads on each piece. Sew slowly and do not pull the lace. The zigzag will hold the edges together and prevent fraying.
This method is trickier than overlapping because the edges have to stay perfectly aligned. If the lace shifts, the seam will be crooked. Practice on a scrap first, and use a walking foot if your machine has one — it feeds the top and bottom layers at the same speed and keeps them from sliding.
Test your settings on scrap lace first
Before you sew your actual project, cut two small pieces of the same lace and test your needle, thread, stitch length, and tension on them. Sew a short seam and look at both sides. The stitches should be even and small, the thread should not show through the lace holes, and the lace should lie flat with no puckering or pulling.
If the lace is puckering, loosen the top tension slightly or increase the stitch length. If the thread is breaking, you may need a larger needle or a different thread type. If the stitches are too loose or too tight, adjust the tension dial in small increments — usually one number at a time — and test again.
Keep the test pieces so you can refer back to them if something goes wrong on the main seam. They also serve as a record of what worked for this particular lace.
Trim and finish the seam allowance
Once the seam is sewn, trim the seam allowance to one-quarter inch on each side of the stitch line. Use small, sharp scissors and cut slowly so you do not accidentally cut into the lace itself. If the lace is very delicate, use a seam ripper to carefully separate the layers first, then trim.
Lace does not fray the way woven fabric does, so you do not need to finish the raw edges with a zigzag or binding. However, if the seam allowance will be visible from the front — for example, on a sheer garment — you can fold it to one side and tack it down with a few hand stitches using thread that matches the lace.
Press the seam gently from the underside using a low heat setting and a pressing cloth. Do not use a hot iron directly on lace, as the heat can melt or damage the fibers. A cool iron and a light touch will set the seam without harming the lace.
Frequently Asked Questions
Can I use a serger to sew lace to lace?
A serger can work, but it is not ideal for delicate lace. Sergers cut the fabric as they sew, which can damage the open structure of lace. If you do use a serger, use the finest thread available, a rolled hem setting, and test on scrap lace first. A regular sewing machine with a narrow zigzag is usually safer and gives you more control.
What if my lace is very stretchy or has a lot of give?
Stretchy lace needs extra stabilization. Use tear-away or water-soluble stabilizer on both the top and bottom of the seam, not just underneath. Sew slowly and do not pull the lace. You may also want to use a walking foot to keep the layers from sliding. Test on scrap lace to make sure the seam does not pucker when you remove the stabilizer.
Should I use a rolled hem for lace seams?
A rolled hem is an option if you have a machine with that setting, but it is not necessary for lace-to-lace seams. A narrow zigzag or a straight stitch with overlap is simpler and gives you more control. A rolled hem works best for finishing the outer edges of lace, not for joining two pieces together.
How do I fix a puckered lace seam?
If the seam is already puckered, you can try pressing it gently with a cool iron and a damp cloth to relax the lace. If that does not work, you may need to remove the seam and resew it with a longer stitch length, looser tension, or stabilizer underneath. Always test your new settings on scrap lace before you try again on the actual seam.
Can I machine wash a garment with lace-to-lace seams?
Yes, but use a gentle cycle with cool water and a mesh laundry bag to protect the seams. Lace-to-lace seams are strong when they are sewn correctly, but the delicate lace itself can snag or tear in the washer. Hand washing is safer if the garment is very delicate or if the seams are new and not yet fully set.