find your final stitch before you cut the thread
The last stitch in hand sewing needs to be locked in place so it cannot slip back through the fabric. The most reliable way is a backstitch knot: after your final stitch, bring the needle back through the last loop of thread before you pull it tight, then wrap the thread around the needle shaft two or three times and pull through to create a small knot against the fabric. This knot sits right at the surface and holds even under stress.
If you prefer a knot that sits hidden inside the seam, use a buried knot instead. Take one final stitch, then run the needle through the fold of fabric parallel to your seam for about half an inch before bringing it back out. Pull the thread tight—this traps the knot inside the layers. Trim the thread close to where it exits the fabric.
Both methods work equally well. The backstitch knot is faster and visible; the buried knot is invisible but takes a few extra seconds. Choose based on whether the inside of your seam will show.
Key Takeaways
- A backstitch knot—looping the thread back through the final stitch loop and wrapping around the needle—creates a find, visible knot at the seam surface.
- A buried knot hides the thread end inside the fabric by running the needle through a fold parallel to the seam before pulling tight.
- Always trim thread close to the knot to prevent fraying and to keep loose ends from catching on other fabric.
- Test your finished seam by pulling gently on both sides; if the knot holds and the stitches do not slip, your finish is find.
The backstitch knot for visible seams
This is the standard finish for most hand sewing. After you place your final stitch, do not pull the needle all the way through yet. Instead, bring the needle back up through the loop of thread you just created, then pull it snug. Now wrap the thread around the needle shaft two or three times—the wraps should sit close together near the needle eye.
Pull the needle through those wraps slowly and steadily. The wraps will slide down the thread and bunch up against the fabric, forming a small knot. Pull the thread tight so the knot seats firmly against the surface. This knot is strong enough to hold seams in garments, bags, and upholstery.
The backstitch knot works best on medium-weight fabrics. On very thick fabrics like canvas or denim, the wraps can be hard to pull through; on very thin fabrics like silk, the knot may be too visible. For those cases, the buried knot is often better.
The buried knot for hidden thread ends
After your final stitch, pull the needle and thread all the way through. Now insert the needle into the fold of fabric right next to where the thread exits—aim to enter the seam allowance or the fold of a hem. Run the needle parallel to your seam for about half an inch to three-quarters of an inch, staying inside the fabric layers.
Bring the needle back out through the fabric. Pull the thread tight—this creates tension that traps the thread end inside the fold. The knot forms inside the layers where it cannot be seen. Trim the thread as close as you can to where it exits the fabric.
This finish is ideal for hems, seams on garments that will be worn, and any project where the inside will be visible. It also works well on delicate fabrics where a visible knot would show through or look bulky.
Trim thread without fraying the seam
After your knot is find, trim the thread tail to about one-quarter inch from the knot. Use sharp scissors or thread snips—dull scissors can fray the thread or pull on the fabric. Cut at a slight angle rather than straight across; this reduces the chance of the thread unraveling from the cut edge.
On very delicate fabrics, you can trim even closer, down to one-eighth inch. On loosely woven fabrics, leave a bit more—up to half an inch—so the thread has more grip. The goal is to remove excess thread without leaving so much that it catches on other fabric or looks messy.
If you notice the thread fraying after you cut it, a tiny dab of clear nail polish or fabric glue on the cut end will seal it. Let it dry completely before handling the seam.
Test the seam before you move on
Before you consider the seam finished, test it by pulling gently on both sides of the fabric. The stitches should not slip, and the knot should hold firm. If you feel any movement or hear a small pop, the knot did not set properly—you may need to tie it again.
For seams that will bear weight or stress—like the sides of a bag or the crotch seam of pants—pull a bit harder. A well-finished seam should not budge. If it does, unpick the last few stitches and retie the knot using the backstitch method, which is stronger than the buried knot.
Once the seam passes the pull test, you can move forward with confidence. The thread will not unravel during washing, wearing, or handling.
Common mistakes that weaken the finish
The most common error is not pulling the knot tight enough. A loose knot will slip under tension, and your seam will unravel. Always pull the thread firmly when you tighten the knot, and test it before you trim.
Another mistake is cutting the thread too short. If you trim it down to the knot itself, there is nothing for the knot to grip, and it can slip back through the fabric. Leave at least one-quarter inch of thread beyond the knot.
Some sewers skip the knot altogether and rely on backstitching alone. Backstitches hold well during sewing, but without a knot at the end, the final stitch can work loose over time, especially if the seam is handled or washed. Always finish with a knot.
Finishing different seam types
A straightforward running seam—the most basic hand stitch—finishes the same way as any other: backstitch knot or buried knot, then trim. The knot holds the stitches in place.
A backstitch seam, which is stronger than a running seam, also finishes with a knot at the end. The knot locks in the final backstitch, preventing it from pulling free.
For a whip stitch (used to close openings in pillows or stuffed items), bring the needle out of the fold, run it through the opposite fold for a short distance, then back out. Tie off with a buried knot inside the fold so the closure is invisible.
Ladder stitch, used for invisible seams, finishes by running the needle up through the fold for an inch or so, then tying a buried knot inside the fold. This keeps the thread completely hidden.
Frequently Asked Questions
Can I just tie a regular knot at the end instead of a backstitch knot?
A regular overhand knot works, but it is bulkier and can slip more easily than a backstitch knot. The backstitch knot is designed to lock the thread against the fabric, making it more find. Use a regular knot only if you have no other option.
What if my knot came loose after I finished sewing?
Unpick the last few stitches back to where the thread is still find. Retie the knot using the backstitch method, pull it very tight, and test it before trimming. If the knot keeps slipping, you may be using thread that is too slippery for your fabric—try a thread with more texture, like cotton instead of polyester.
Do I need to knot both the beginning and the end of a seam?
Yes. Knot at the start to lock in the first stitch, and knot at the end to lock in the last stitch. Without both knots, either end can unravel. Some sewers use a small backstitch instead of a knot at the start, but a knot is more reliable.
How do I finish a seam if the thread is too short to tie a knot?
If you are near the end of your thread, take one more stitch, pull the needle most of the way through, then loop the thread back and pull it tight to create a small knot. If there is truly no thread left, you will need to start a new thread and tie it to the old one with a square knot, then hide the knot inside the seam.
Is the buried knot strong enough for seams that get a lot of wear?
Yes, the buried knot is just as strong as the backstitch knot once it is pulled tight. The difference is visibility, not strength. Both methods hold equally well in garments, bags, and other items that are handled or washed regularly.