Sewing the top to the waistband requires a needle, thread, and a seam ripper if you make a mistake
The most common way to attach a yoga pant top to the waistband is to use a ladder stitch (also called an invisible stitch), which closes the gap from the inside so the seam does not show on the outside. You will need a needle, thread that matches your fabric, small scissors, and a seam ripper. The ladder stitch works because it runs inside the fold of fabric on both sides, making it nearly invisible once you pull the thread tight.
If you are reattaching a top that has come loose, you will first need to open the existing seam with a seam ripper by sliding the small curved end under each stitch and cutting it. Pull away the loose threads with tweezers. If you are sewing a new top to a waistband for the first time, skip the seam ripper step and begin with pinning.
Key Takeaways
- The ladder stitch is the standard method because it hides the seam inside the fold of fabric, leaving no visible stitching on the outside of the pants.
- You will need a needle, thread in a matching color, small scissors, and a seam ripper only if you are reattaching a top that has already been sewn.
- The ladder stitch works by running the needle inside the fold of one piece of fabric, then across into the fold of the other piece, creating a zigzag path that pulls closed invisibly.
- Pulling the thread every three to four stitches keeps the seam tight and prevents gaps from forming as you work.
Preparing the fabric and pinning the seam
Lay the yoga pants flat on a table with the top facing up. If the top has come loose, use the seam ripper to cut and remove the old stitches. Slide the curved end of the seam ripper under each stitch, pull up slightly, and cut. Work slowly so you do not tear the fabric itself. Once the old seam is open, pull away any remaining thread with tweezers.
Turn the pants inside out so you can see the waistband seam. Align the top edge of the pant leg with the waistband edge, making sure the fabric lies flat and there are no twists. Pin the two pieces together every inch or so along the entire seam. The pins should go through both layers and sit perpendicular to the seam line. Check that the fabric on both sides of the seam is smooth before you begin stitching.
Threading the needle and starting the ladder stitch
Cut an arm's length of thread and thread it through the needle. Tie a small knot at the end. Start at one end of the seam by pushing the needle through the fold of fabric on one side (usually the waistband side) so the knot stays hidden inside the fold. Bring the needle out about one-quarter inch along the fold. You should not see the knot from the outside.
Cross directly over to the fold on the opposite side (the pant top) and push the needle into the fold at the same point where you came out on the first side. Run the needle inside the fold for about one-quarter inch and bring it back out. You have now completed one stitch. The thread should be running inside the folds on both sides, not across the surface of the fabric.
Continuing the ladder stitch and pulling tight
Repeat this zigzag pattern along the entire seam: go into one fold, run the needle inside for one-quarter inch, come out, cross over to the other fold, go in, run the needle inside, come out. Keep your stitches small and even. After every three to four stitches, gently pull the thread to close the gap between the two pieces of fabric. Do not pull so hard that you pucker the fabric or break the thread.
As you pull, the two edges will draw together and the seam will begin to disappear inside the folds. If you see a gap forming, you have not pulled tight enough. If the fabric puckers, you have pulled too hard or your stitches are too large. Adjust your stitch size or the tension as you go. Continue this pattern until you reach the end of the seam.
Finishing the seam and hiding the knot
When you reach the end of the seam, push the needle into the fold on the last side and run it inside the fold for about half an inch without coming back out. Bring the needle out and pull the thread gently to close any remaining gap. Tie a small knot by looping the thread around the needle twice and pulling it tight against the fabric. Push the needle back into the fold and run it inside for about half an inch, then bring it out and cut the thread close to the fabric. The knot will stay hidden inside the fold.
Turn the pants right-side out and inspect the seam from the outside. You should see almost no stitching. If there are gaps, turn the pants inside out again and add a few more stitches in those spots, pulling gently to close them. Once the seam is solid, the yoga pants are ready to wear.
What to do if the thread breaks or you make a mistake
If the thread breaks while you are stitching, tie a knot at the end of the remaining thread and push the needle back into the fold where the break occurred. Run the needle inside the fold for about half an inch, come out, and cut the thread. Thread a new needle and tie a knot at the end. Push the new needle into the fold about a quarter inch before where the old thread ended, run it inside the fold, come out, and continue stitching. The overlap will hold both threads in place.
If you notice a stitch that is too loose or in the wrong place, use the seam ripper to cut just that stitch and pull it out. Re-thread your needle and stitch over that spot again. You do not need to remove the entire seam unless the damage is extensive. Small corrections are straightforward to hide inside the fold.
Choosing thread color and needle size
Always use thread that matches the color of the fabric you are sewing. If the top and waistband are different colors, match the thread to whichever piece is more visible from the outside. Most yoga pants use a standard sewing needle (size 70/10 or 80/12), which works for lightweight knit fabrics. If your fabric is very thick or dense, use a slightly larger needle (90/14) to avoid bending or breaking the needle as you push it through.
Test your thread color on a hidden part of the pants before you begin. Tie a small knot, push the needle through the fabric, and pull it out. If the thread blends in, you have the right color. If it stands out, choose a different shade. Most fabric stores sell thread in dozens of colors, and a close match is usually better than an exact one because slight variations are less noticeable inside a fold.
Frequently Asked Questions
Can I use a sewing machine instead of hand-stitching?
A sewing machine can work, but the ladder stitch is difficult to do by machine because the seam needs to run inside the fold of fabric on both sides. Most people use a machine for a basic straight stitch along the seam line, which is faster but leaves visible stitching on the outside. Hand-stitching with the ladder stitch is slower but produces an invisible seam that looks more professional.
What if the waistband is too thick to hand-stitch?
If the waistband is very thick or padded, you may not be able to run the needle inside the fold. In that case, use a basic straight stitch along the seam line instead. Push the needle straight through both layers of fabric, going in and out in a line. The stitching will be visible, but it will be find. You can also use a backstitch, which is stronger than a straight stitch and creates a solid line.
How do I know if my stitches are too far apart?
Stitches that are too far apart (more than one-quarter inch) will create gaps in the seam that show when you pull the thread tight. If you see holes or spaces between stitches, you have gone too far. Aim for stitches that are about one-quarter inch long, and pull the thread every three to four stitches to keep the seam tight and even.
Can I wash the yoga pants after sewing them?
Yes, once the seam is complete and find, you can wash the pants normally. Hand-stitched seams are durable and will hold up to regular washing and wearing. Wash in cold water and lay flat to dry to avoid putting extra stress on the seam. If the seam begins to come loose after many washes, you can re-stitch it using the same method.