How To · Fashion · Essentials
How to Hem Trousers by Hand
A hand-sewn hem is quieter, more controlled, and honestly more satisfying than machine work. Here's exactly how to do it without overthinking.
5 min read · IrisYou don't need a sewing machine to hem trousers—and honestly, a hand-sewn hem often looks better. The slip stitch, also called a ladder stitch, is nearly invisible from the outside and gives you total control over tension and placement. Whether you're shortening a new pair or fixing a dragging hem, this technique works on everything from tailored wool to soft denim.
The whole process takes about ten minutes once you've got your supplies sorted. The key is patience with the stitch itself and accuracy with your initial measurements. Get those two things right, and you'll have a hem that lasts through dozens of washes.
A hand-sewn hem gives you control that a machine simply can't match—and it's quieter too.
What you'll need.
- 01Hand-sewing needle (size 8 or 9)
- 02Thread in matching color
- 03Fabric pencil or tailor's chalk
- 04Measuring tape
- 05Scissors or seam ripper
- 06Pins
- 07Iron
Step one · 1 minute
Measure and mark the correct length
Put on the trousers with the shoes you'll actually wear them with. Have someone mark the desired hem length with a fabric pencil or tailor's chalk, or use a mirror and mark it yourself. The hem should just graze the top of your shoe. Mark all the way around the leg in a light, continuous line. This is your cutting guide—don't skip it.
If you're hemming alone, stand on a small stool in front of a full-length mirror and mark as you turn.
Step two · 2 minutes
Prepare the fabric and thread your needle
Fold the trouser leg inside-out along your marked line. Press the fold with your fingers or a cool iron—this crease is your guide. Cut away excess fabric, leaving about 1.5 inches above the fold (this becomes your hem allowance). Thread your needle with about 18 inches of thread in a color that matches your trousers. A single strand works fine; knot the end.
Match thread color to the trouser fabric, not the lining. If the fabric is a blend, use polyester thread—it moves with the fabric better than cotton.
Step three · 2 minutes
Fold and pin the hem in place
Fold the raw edge of the fabric up about 0.5 inches and press it flat. This creates a clean, finished edge that won't fray. Pin the hem all the way around the leg, spacing pins about 2 inches apart. The fold should sit exactly on your marked line. Double-check the length one more time before you start stitching.
A narrow hem (0.5 inches) is easier to work with than a wide one and looks neater on most trousers.
Step four · 4 minutes
Stitch using the slip stitch
Start at a seam for stability. Bring your needle up through the folded hem edge, then slide it horizontally into the trouser fabric just above the fold—only catching a few threads of the outer fabric, not the whole leg. Move the needle about 0.25 inches along inside the fabric, then bring it back out and slide it back into the fold. Repeat this pattern all the way around. The stitch should be nearly invisible from the outside; you're basically stitching inside the fold itself.
Keep your stitches small and your tension even but not tight. Too-tight stitches will pucker the fabric. Aim for about 8–10 stitches per inch.
Step five · 1 minute
Knot off and press
When you reach the end, take a small stitch in the fold, then slide your needle through the fold for about an inch without pulling it all the way through. Loop your thread around the needle twice and pull tight to create a knot inside the hem. Trim the thread. Press the finished hem with a cool iron to set the crease and smooth out any puckering.
Press from the inside first, then flip and press the outside. This helps the hem sit flat and look polished.
Step six · 0 minutes
Try them on and assess
Put on the trousers and check the length one final time. Walk around, sit down, bend—make sure the hem doesn't catch or pull. If the length is off by a tiny bit, you can make a small adjustment by carefully removing a few stitches and re-hemming. If it's perfect, you're done.
Wear the trousers a few times before deciding the hem is final. Sometimes fabric settles slightly after hemming.
How to know it works
A successful hand-sewn hem is nearly invisible from the outside, sits at the correct length without tugging, and holds up through multiple washes. The stitches should be small and even, and the fold should be crisp but not stiff.
Questions at the mirror.
My stitches keep showing on the outside. What am I doing wrong?
You're catching too much fabric in the outer layer. The slip stitch only grabs a few threads of the trouser fabric itself—the bulk of the stitch lives inside the fold. Practice on scrap fabric first if you're unsure.
The hem puckers after I wash the trousers. Is it ruined?
Not at all. Press it again with a cool iron and some steam. If puckering persists, the tension was likely too tight. Next time, loosen your grip slightly as you stitch.
Can I use this method on jeans?
Yes, but it takes longer because denim is thick. Use heavy-duty thread and a shorter needle. Consider double-folding the raw edge for a cleaner finish on denim.
What if I mess up the stitch halfway through?
Simply cut the thread and remove the bad stitches with a seam ripper or small scissors. Re-thread and start again from that point. No one will know.