Pants Alterations: What Can Change, What Can’t, and What We Check First

Most pants that sit in a closet unworn have one fixable problem: the waist gaps, the legs are too wide, or the hem drags on the ground. A few have a problem nobody can fix, and it helps to know which kind you own before you replace them.

This guide covers pants alterations from the counter side: what can be changed, what decides whether a change will work on your pair, how dress pants should fit, and what to bring to a fitting.

Pants are among the most common garments brought to our alterations counter in Mesa. Some changes are simple; some depend on fabric we cannot see until we turn the pants inside out.

The pants alterations people ask for most

Before we pick up a pin, we ask what bothers you when you wear them. The answer usually points to one of these.

The federal O*NET profile for tailors, dressmakers and custom sewers lists the same core tasks: marking or pin-folding alteration lines on pant legs, letting out or taking in seams to improve fit, tapering pant legs, and repairing or replacing zippers. What varies is how much each pair will allow.

How dress pants should fit before you change anything

Here is what we look for when you stand in front of the mirror at our counter.

• Waist. The waistband stays put without a belt doing all the work, with room for a finger or two inside.
• Seat. The fabric falls smoothly over your seat. Horizontal pulls mean too tight; loose folds that sag under the seat mean too much fabric.
• Rise and crotch. No pulling up when you sit, no bunching or hanging low when you stand.
• Thighs and legs. The leg hangs straight from the seat without clinging, and a pressed crease runs straight down the front.
• Length. The hem touches the shoe with the amount of break you prefer and does not drag at the heel.

A New Mexico State University extension guide on fitting pants lists the problems to avoid, including ripples at the waistline and wrinkles or bagginess at the crotch, and notes that fit at the hip is difficult to alter. That matches what we see: if a pair fits your hips and seat, nearly everything else can be adjusted.

A note on Arizona weather: many people in the East Valley wear wool trousers only once it cools down. Try those pairs on in October, before an event rather than the morning of it.

Taking in the waist

A gap at the back of the waistband is one of the most common complaints we hear, and usually one of the simpler fixes.

On most dress trousers the fix happens at the center back seam. The waistband is opened at the back, the seam is sewn deeper at the top and tapered back into the original seam lower down, and the waistband is shortened to match.

If you sew and want to try it at home:

1. Put the pants on inside out, pinch the excess at the center back seam and pin it. 2. Chalk the new line, tapering smoothly into the original seam at the curve of the seat. 3. Unpick the waistband and belt loop at center back. 4. Sew the new line and try the pants on before trimming anything. 5. Shorten and rejoin the waistband, reattach the belt loop and press.

The trouble starts when a lot needs to come out. Take too much from the back seam alone and the back pockets crowd each other, so the reduction has to be shared with the side seams, which is harder to do cleanly at home.

Letting out and tapering: what decides if it works

People often assume these are always possible. They are not, and the reason is inside the seams.

Letting pants out

Many dress trousers are made with extra seam allowance at the center back seam and waistband, so they can be let out a little. Many casual pants and jeans are not. Turn your pants inside out: if the fabric beyond the center back stitching is wide, there may be room; if it is overlocked tight to the stitching, there is little or none.

Even when there is room, the old stitching line can leave a faint mark on the outside, especially on worn fabric. At home, unpick the seam, sew the new line inside the old one, and press the old line from the inside with a damp press cloth.

Because this depends on the individual pair, call and ask whether your pants can be let out before you bring them in.

Tapering the legs

To taper pants, the inseam, the outseam or both are sewn in along a graduated line, usually starting around the knee and running down to the hem. The leg must still be wide enough at the ankle for your foot to go through, and the line has to be smooth so the leg does not kink.

At home, pin the new line on one leg with the pants inside out, chalk a smooth line, baste it and try them on before sewing. Copy the result exactly to the other leg.

Tapering can pull side pockets out of line and shorten the leg slightly, so the hem often has to be redone after. Call and ask whether your pants can be tapered, and bring the shoes you wear with them.

Hems, cuffs and jeans

Shortening is the simplest of all pants alterations. The choice that matters is the break, meaning how the hem meets your shoe: no break, a slight break, or a full break. Our guide on hemming pants at home explains each style and the three main hemming methods if you want to do it yourself.

Lengthening only works if there is enough fabric folded inside the existing hem, and the old crease can show.

Cuffed trousers need the cuff rebuilt, not just folded, so bring them in rather than guessing. Jeans can often be shortened while keeping the original faded hem. If your jeans or trousers also have a zipper that catches or splits, our guide on diagnosing a broken zipper will tell you whether it needs a new slider or a whole new zipper.

A Mesa-specific reason not to put this off: pants that drag on the ground pick up dust, and during monsoon season that dust ends up ground into the hem. The heel wears through faster, and once the fabric frays there is less of it to work with.

What to bring to a fitting at our Mesa counter

Here is what helps us get pants alterations right the first time:

• The shoes you will wear with the pants. A change in heel height moves the hem. Oregon State University Extension’s hemming fact sheet gives the same advice: mark the hem while wearing the same shoes and undergarments you will wear with the garment, and wear the belt if you normally do.
• The belt, for the same reason. It changes where the waistband sits.
• The pants, clean. If they need cleaning too, tell us at the counter and we will talk through whether to clean them before or after the work.
• A pair that fits well, if you have one, to show us the length or leg shape you like.
• The jacket, if the pants belong to a suit. Our post on changing the fit of a suit covers the rest of the outfit.

At the fitting we pin the changes with you standing naturally, check both legs separately, and look inside the seams and hem before promising anything. If a change is not worth making, we will say so.

Do it yourself or bring it in?

A plain hem on chinos or a small take-in at the back seam is within reach at home if you sew.

Bring them in when:

• The pants are lined, because the lining has to be altered separately.
• The pants are cuffed, tapered, or part of a suit.
• The fabric is wool, silk, velvet or a fine blend that marks or shines under a hot iron.
• You need a zipper replaced rather than a slider fixed.

Our alterations and repairs service covers hems, zippers, taking in, and formal and wedding wear. For anything outside that list, call and ask whether your pair can be done.

The bottom line

Good pants alterations start with an honest look at the pair. Length, waist and taking in are usually straightforward. Letting out and tapering depend on the fabric inside the seams. The hips and seat are the hardest to change, so if those fit, the rest is often worth fixing.

Bring the pants, your shoes and your belt to 1911 E Brown Rd, Unit 1, Mesa, Monday to Friday 8 to 6 or Saturday 9 to 3, and we will pin them on you. You can call us on (480) 969-9982 with questions first. For garments that do not need a fitting, there is a 24-hour drop-off box outside the store, and East Valley pickup and delivery runs on Wednesdays and Fridays, scheduled by phone.

Bipin Kanabar — Owner, Bartoli Cleaners & Laundry, serving Mesa since 1957.

Frequently asked questions