How To · Fashion · Tailoring
How to Hem Trousers Like a Tailor
A proper hem separates polished from sloppy. Whether you're working with wool suiting or casual chinos, mastering this single skill transforms how your trousers sit and drape.
5 min read · IrisThe hem is where tailoring becomes visible. A crooked hem or incorrect length undermines even expensive trousers, while a clean, properly measured hem elevates everything from vintage thrifts to new purchases. You don't need a sewing machine or advanced skills—just precision, patience, and the right approach for your fabric weight.
This guide covers hand-stitching and machine methods, so you can choose what works for your skill level and available tools. The key is measuring twice, pinning carefully, and understanding that trouser hems have specific rules about break and length that matter.
A crooked hem or incorrect length undermines even expensive trousers.
Step one · 5 minutes
Measure the correct length
Put on the trousers with the shoes you'll actually wear them with—this is non-negotiable. Stand naturally in front of a mirror. The trouser leg should break slightly on the top of your shoe, creating a gentle fold at the front. Measure from the inseam at the crotch down to where the hem should sit. Mark this length on both legs with a fabric pencil or tailor's chalk, measuring from the existing hem upward. The difference between legs is usually 0.25–0.5 inches; note this before you cut.
If you're between sizes or unsure about break, aim for a quarter-break (slight fold) rather than a full break—it's more forgiving and modern.
Step two · 5 minutes
Try on and pin the hem
Put the trousers back on and have someone help you pin the hem at the marked length, or use a full-length mirror and pin yourself. Pin every 2–3 inches around the leg, placing pins horizontally so you can walk without them catching. Walk around briefly to confirm the length feels right and the break is even. If you're hemming alone, pin while seated on a chair facing the mirror, then stand and check. This is your moment to adjust before any cutting or stitching.
Pins should go through both layers of fabric but not so deep that you can't remove them easily. If the length still feels off, re-pin rather than proceeding.
Step three · 8 minutes
Trim excess fabric and fold the hem
Remove the trousers carefully, keeping pins in place. Lay each leg flat on a cutting surface. Using sharp fabric scissors or a rotary cutter, trim the excess fabric to 1.5 inches below your pin line—this gives you enough fabric to fold and stitch without bulk. Fold the raw edge up 0.5 inches and press with an iron on low to medium heat (check your fabric's care label first). Then fold the entire hem up to your pin line and press again. This creates a clean, finished edge that looks professional.
For heavier fabrics like wool, consider using a serger or pinking shears on the raw edge before folding to reduce fraying and bulk.
Step four · 20 minutes
Hand-stitch or machine-stitch the hem
For hand-stitching (the traditional method), use a blind stitch: thread a needle with thread matching your trousers, knot the end, and work from inside the fold. Bring the needle out through the fold, catch 2–3 threads from the trouser leg just below the fold, then return the needle into the fold directly across from where you came out. Slide the needle inside the fold for 0.25 inches and repeat. Stitches should be invisible from the outside. For machine-stitching, use a blind hem foot if your machine has one, or a straight stitch 0.25 inches from the fold, working from the inside. Backstitch at the beginning and end.
Hand-stitching takes longer but is more forgiving on delicate fabrics and gives a softer, less visible line. Machine-stitching is faster and holds better on casual trousers.
Step five · 5 minutes
Press and inspect
Once stitching is complete, press the hem flat with an iron. Lay the trousers on an ironing board with the hem facing up, place a pressing cloth over it, and press gently. Flip and press from the outside as well. This sets the stitch and removes any puckering. Try the trousers on one final time to confirm the length and that the hem sits evenly all the way around.
If you notice puckering or uneven stitching, don't panic—a second press often fixes minor issues. Only use a seam ripper if the stitch is genuinely off.
Step six · 2 minutes
Clean up and wear
Remove any remaining pins or chalk marks. If you used tailor's chalk, a damp cloth will remove it. Inspect the hem from the inside and outside one more time. You're done—put them on and enjoy the fit.
If this is your first hem, choose a pair of casual trousers to practice on before tackling expensive suiting.
How to know your hem is finished
A successful hem is invisible from the outside, sits at the correct length with a gentle break, and feels secure when you walk. The stitching should hold through multiple washes without puckering or unraveling.
Questions at the mirror.
Can I hem stretch fabrics like chinos or cotton blends?
Yes, but use a stretch needle and slightly looser tension on your machine, or hand-stitch with a flexible thread. Stretch fabrics can snap regular stitches, so test on a scrap first if possible.
What if my trousers have a cuff or original hem I want to preserve?
If the cuff is already there and you're just shortening, measure from the inside of the cuff and work above it. If you need to remove and re-fold the cuff, that's a more advanced alteration—consider a tailor for this.
Should I hem before or after my first wash?
Hem after at least one wash if the trousers are new cotton or linen, as they may shrink slightly. For wool or synthetic blends, hemming new is fine.
What thread color should I use?
Match your trousers as closely as possible. If you can't find an exact match, choose slightly darker rather than lighter—it's less visible. For dark trousers, navy or black works; for light trousers, khaki or cream.