How to Measure Inseam on Your Body and on Pants

What an Inseam Actually Measures

The inseam is the inner leg seam of a pair of pants, measured from the crotch seam where the two leg seams meet, straight down to the hem. On a body rather than a garment, it is the distance from the highest point of your inner thigh to your ankle bone. Nathan Tailors, a custom tailoring service, defines it exactly that way in its inseam measurement guide, and adds a useful warning: inseam alone cannot set trouser length, because shoe height, break preference, and rise all move the finished number by more than a typical measuring error.

Two related numbers keep getting mixed up with it. The outseam runs up the outside of the leg, from the same hem all the way to the top of the waistband. The rise is the vertical distance from the crotch seam up to the waistband. The three are linked by simple arithmetic: outseam minus inseam equals rise. That relationship explains a frustration almost everyone has had. Two pairs of jeans can both be labeled 30 inches and still sit at different heights on your leg, because a high-rise pair pulls the crotch seam upward and takes the whole leg with it.

Method One: Measure Your Inseam on Your Body

To measure your inseam on your body, stand barefoot and run a tape from the top of your inner thigh straight down to your ankle bone. Use this method when you own nothing that fits well enough to copy. It takes about two minutes and it is considerably easier with a second person. Levi's keeps the instruction short in its product size guide: measure from the top of your inner thigh down to the bottom of your ankle.

1. Stand straight, without shoes. Back against a wall, feet roughly shoulder-width apart, weight even on both legs. Fitted leggings or underwear work better than loose pants, because bunched fabric adds length that is not yours.
2. Anchor the tape at the crotch point. Put the zero end of a flexible tape at the highest point of your inner thigh, where a crotch seam would sit. This is the step where a helper matters. Ask them to kneel beside you and hold that end in place so you can stay upright instead of bending over and shortening the reading.
3. Run the tape down to your ankle bone. Straight down the inside of the leg to the bump of the ankle bone, taut but not pulled tight. Do not let the tape wander around the calf, because a curved path always reads long.

Take the measurement two or three times and use the average. Nathan Tailors suggests working to within a quarter inch, roughly half a centimeter, for anything you intend to have altered. If you are measuring alone, there is a reliable substitute for the helper: hold a hardcover book snugly at the top of your inner thigh with the spine facing up, mark the wall at the top edge of the book, and measure from that mark to the floor. That reading is a floor-to-crotch length, so it is a ceiling rather than a hem length. Most hems stop at the ankle bone, a little above the ground.

Method Two: Measure the Inseam on Pants That Fit

To measure an inseam on pants that already fit, lay them flat and measure the crotch seam straight down to the hem. If you own one pair whose length you love, copy that pair rather than measuring your leg. This method is more accurate than the body method for online shopping, because it captures how a real garment behaves on you rather than an abstract leg length. NYDJ describes the same two steps in its inseam chart guide: lay them flat, then measure from the crotch seam straight down to the hem.

1. Lay the pants flat and smooth them. Button and zip them first, then press out every wrinkle with your hand. A single fold across the knee can cost you half an inch.
2. Fold one leg back. Bring one leg over the other so the inner seam of the remaining leg lies in a clean straight line from crotch seam to hem.
3. Measure crotch seam to hem. Start the tape at the point where the four seams meet and finish at the very bottom edge of the hem, not at the top of the hem stitching. Write the number down along with the style name, because it will not transfer cleanly to a different cut.

Repeat this on two or three pairs you like and you will often find the numbers cluster within an inch of each other. That cluster, rather than any single pair, is your practical shopping inseam.

Typical Inseam Ranges by Height

Length categories are brand conventions, not anatomy, so treat the table below as a starting point rather than a rule. The height bands and inseam ranges come from NYDJ, which publishes both a petite, regular, and tall fit guide and an inseam chart. Centimeter values are converted and rounded to the nearest whole number.

Retailer stock ranges show how wide the real spread is. Search By Inseam's short-inseam buying guide notes that Gap lists inseams from 26 to 31 inches, Nordstrom carries roughly 27 to 31 inches, and Old Navy's petite jeans start around 28 inches. Levi's size guide offers women's jeans in 28, 30, and 32 inch inseams. If your measured number falls between two offered lengths, order the longer one. Fabric can be removed by a tailor for the price of a coffee; it cannot be added.

Inseam by Pant Style, and Where the Hem Should Break

Your body inseam is one number. The inseam you should order changes with the cut, because each style is drafted to end at a different point. NYDJ notes that bootcut and flare jeans are designed to skim the floor and often run slightly longer, while skinny and straight jeans hit higher. The same brand lists its Teresa wide-leg at a 33 inch inseam and its Ami skinny at 29 inches: four inches apart, same label, same customer.

CLR Wear's pant length guide gives concrete adjustments for the common cuts: subtract half an inch for skinny jeans, use your true inseam or add a quarter inch for bootcut, and reduce by 2 to 4 inches for cropped trousers. The table below combines those adjustments with the hem position each style is aiming for.

"Break" is the tailoring word for how much the hem folds when it meets your shoe. Black Lapel's guide to dress pant breaks sorts it into four: a no break hem just reaches the top of the shoe without resting on it; a quarter break rests slightly on the shoe; a half break makes solid contact and forms one slightly visible wrinkle; a full break forms a single generous fold that covers most of the laces. Decide which one you want before you order, because it moves the inseam you need by an inch or more.

Add for Heels, Subtract for Flats

One inseam cannot serve ballet flats and 4 inch heels at the same time. Raising your heel lifts your whole stance, which pulls the hem up and away from the floor. CLR Wear recommends adding roughly half an inch to a full inch to your inseam for heels, and using your true inseam or a fraction less for flats and sneakers so the hem clears the ground.

The practical version of this: measure your inseam once, barefoot, then keep two numbers in your phone. A flat-shoe inseam and a heel inseam, roughly an inch apart. When you buy a pair of trousers you already know which shoes they are for, so you already know which number to shop against. If you are having something hemmed, wear the exact shoes to the fitting and tell the tailor which break you want. That single sentence removes most of the guesswork from the appointment.

Women's and Men's Inseams Are Labeled Differently

The measuring method is identical. The labeling is not, and that is the part that trips people up when they shop across departments. Levi's size guide shows the split clearly. Men's jeans are sold as a waist number by an inseam number, with waists from 28 to 38 inches paired with 30, 32, and 34 inch inseams. Women's jeans are sold as a single size number, 24 through 34, which maps to waist and hip measurements, with inseams offered at 28, 30, and 32 inches.

Two consequences follow. First, a woman shopping women's jeans often chooses a named length category, petite or regular or tall, instead of an exact inseam, so she has to know which category her number falls into. Second, the offered inseam range sits lower in women's departments than in men's. If your measured inseam is 34 inches, the men's rack may simply carry your length while the women's rack tops out below it. Tall lines exist for exactly this reason, and they are worth searching by name.

Height Is a Clue, Not an Answer

Height narrows an inseam to a two-inch band, but it does not settle it. The NYDJ ranges in the table above give a 5'5" to 5'8" frame a full-length inseam of 30 to 32 inches (76 to 81 cm), and the petite band directly below it runs 28 to 30 inches (71 to 76 cm), so the two categories overlap at 30 inches. Two people of exactly the same height can therefore land in different length categories, because the split between torso length and leg length varies from body to body. Neither version is a problem to solve. It simply means that a height chart gets you into the right neighborhood and your own tape measure gets you to the door. This is also why length categories carry adjusted rises rather than just shorter legs: NYDJ describes its petite fits as having shorter inseams and adjusted rises so the proportions stay balanced.

If you have a longer torso relative to your legs, a higher rise moves the visual waistline up and keeps the leg line uninterrupted. If your legs are long relative to your torso, a mid rise with a generous inseam gives you room to wear a full-length hem without the waistband sitting under your ribs. Both of these are proportion decisions, not size decisions, and they hold at every size. Our guide to body shape by height goes deeper on styling for petite and tall frames, and the petite body shapes guide covers rise and hem choices in more detail.

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