Hemming looks like the simplest job in alterations. The trousers are too long, so you make them shorter. Yet hemming is where most do-it-yourself regrets happen in Belmont closets, because the simple part, cutting fabric off the bottom, is the last step, not the first. The real job is measuring, and measuring a hem is measuring a moving target: you, in your shoes, standing the way you actually stand.
You can do the simple parts yourself. You can measure an inseam from a pair you already love, check a hem with a ruler, and even tack a temporary fold for a single wearing. The professional line is clear too, and this guide walks up to it from both sides.
The three measurements that matter
The inseam is the seam running from the crotch to the bottom of the leg. On a pair of trousers that fits you well, lay them flat, smooth the leg, and measure that seam with a tape. That number transfers to any similar trouser. It does not transfer perfectly between styles, because a low rise and a high rise put the starting point in different places, but it gets you within a half inch.
The break is where the front of the trouser leg meets the shoe. A full break folds noticeably over the shoe, a half break touches with a slight fold, and no break just grazes the top. Break is a style choice, but it changes the finished length by up to an inch, which is why two people with the same inseam can need different hems. Outseam, waist to hem along the outside, matters for skirts and dresses where there is no inseam to copy.
Measuring a hem at home, in order
- Start from a pair that already fits. Measure its inseam flat with a tape, twice, and write the number down. This is your reference for similar styles.
- Put the new garment on with the right shoes. Stand on a hard floor, not carpet, which swallows heel height and adds false length.
- Fold, do not cut. Fold the excess up inside the leg and pin it at the side seams. Look at the break in a full-length mirror from the side.
- Sit, walk, and climb a step. Trousers ride up when you sit. If the pinned length shows a lot of sock seated, it will feel short all day.
- Check both legs separately. Most people have a small difference between legs. Pin and measure each side rather than assuming they match.
- Mark, press the fold, and only then decide. If the fabric is delicate, lined, or original-hem denim, stop here and take the pinned garment in.
Why you bring the shoes, every time
Shoes change hems more than any other variable. A flat, a sneaker, and a heeled boot can differ by two inches under the same pair of trousers. A hem set in bare feet will puddle over dress shoes, and a hem set in heels will swing above flats. At Belmont Alterations, as at any careful shop, the fitting starts with the shoes you will actually wear. If one pair of trousers has to serve two very different shoes, be honest about that at the fitting. The usual compromise is a length that works with the shoes you wear most, accepting a longer break with the lower pair.
Where the professional line falls
Some hems are genuinely simple: unlined cotton trousers, casual chinos, a straight skirt in a forgiving fabric. Iron-on hem tape and a careful fold can handle a temporary fix on those. The line moves when the fabric fights back. Jeans often need their original hem reattached to keep the faded edge, which means cutting, rejoining, and topstitching in matching heavy thread. Lined trousers need the lining hemmed separately and slightly shorter. Chiffon, beaded, and lace hems need hand work or a rolled hem that a home machine rarely matches. Cuffs need exact, even construction or they look homemade in the bad sense.
Cutting is the point of no return. A tailor can let a hem down only by what the original maker left folded up, and a home cut removes that option entirely. When in doubt, pin it, wear it around the house for an evening, and leave the scissors in the drawer.
Common questions
What is a normal trouser break?
A half break, where the leg touches the shoe with one slight fold, is the most common modern choice. It works with most shoe styles and reads neat without looking cropped.
Can a hem be let back down?
Only if fabric was left folded inside, and a crease line often remains visible where the old fold was. Steam and pressing reduce it on wool, less so on cotton and linen.
Should hems be washed before measuring?
Yes for cotton and denim that have never been washed. Shrinkage happens mostly in length, so wash and dry new garments the way you normally will before any hem is set.
Photos in this guide are representative stock images.
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