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How to measure yourself for clothes: bust, waist, hips and inside leg

In short: Wear close-fitting underwear, keep the tape level and snug, and measure the fullest part of the bust, your natural waist, the fullest part of the hips and the inside leg. Then use each brand's own chart: tops go by bust or chest, trousers by hips and waist.

By Published 28 October 20265 min readPublisher: Saadat Rafiq

✓ Reviewed by Muqadas Fatima, BFA · 28 October 2026

Illustration of a woman standing straight in front of a mirror with a soft tape measure around her waistIllustration

At a glance

You need
A soft tape measure that does not stretch, a piece of string, a helper, paper
Wear
Close-fitting underwear (NMSU Extension)
Tape
Snug, not tight, and level with the floor
Tops
Go by bust or chest
Trousers and skirts
Go by hips, then waist and inside leg
Advice from
NMSU Extension, Simplicity, Uniqlo, Levi's and ISO, read 28 October 2026
Checked
October 2026

Clothing sizes are meant to be based on the body, not the garment. The European standard EN 13402 says so directly, and gives sizes in centimetres. Its body measurements, and those of the international standard ISO 8559-1, are what brands start from. But every brand draws its own chart (Simplicity), so the goal is a set of accurate numbers you can hold against any chart.

How to take your measurements

  1. Measure round the fullest part of the bust or chest.

    Illustration of a woman holding a tape measure around the fullest part of her chest, the tape level across her back
    Illustration

    Measure round the fullest part of the bust, high under the arms and straight across the back (NMSU Extension). For men's sizes this is the chest.

    For sewing patterns, also measure the high bust: right under the arms, above the bust. Simplicity says that if your bust is 2½ inches (about 6 cm) or more bigger than your high bust, choose the pattern by your high bust instead.

    You should see: in the mirror, the tape level across your back, not riding up between the shoulder blades.

  2. Measure your waist along the string.

    Illustration of a woman with a string tied around her natural waist, holding the tape measure along the string
    Illustration

    Measure along your string, snugly. The catch is that brands don't all mean the same place: see where brands put the waist.

    These usually land close together. If the brand's chart says how it measures, follow that. If you want jeans to sit lower, also measure where you wear them.

    You should see: the tape lying on the string all the way round, without pulling it in.

  3. Measure round the fullest part of your hips.

    Illustration of a woman seen from the side holding a level tape measure around the fullest part of her hips
    Illustration

    Measure round the fullest part of your hips and seat, keeping the tape level (NMSU Extension, Levi's). This is usually 15 to 25 cm (6 to 10 inches) below the waist (NMSU Extension).

    If you're not sure whether you're widest at the hips or the upper thigh, measure both and use the larger number (NMSU Extension).

    You should see: from the side in a mirror, the tape level and round the widest part of your seat (NMSU Extension).

  4. Measure the inside leg (inseam).

    Illustration of a pair of trousers laid flat on a table with a tape measure running along the inside leg seam from the crotch to the hem
    Illustration

    There are two ways. The easier one: lay a pair of trousers that fit you well flat on a table and measure along the inside seam, from the crotch seam to the hem (Uniqlo describes this for men's trousers).

    On the body, a helper measures from the top of your inner thigh down to the bottom of your ankle (Levi's), or to where you want the trousers to end (Uniqlo). Stand straight with your shoes off.

    You should see: four numbers on your paper: bust or chest, waist, hips and inside leg, with the date.

  5. Check what the brand's chart measures, then pick the size.

    Illustration of a woman in a mustard-yellow jumper holding a notebook beside a phone showing a simple blank grid, comparing them, a tape measure on the table
    Illustration

    First check what the chart measures. Some are body measurements; others are garment measurements, taken on the clothes themselves, for example across the chest from armpit to armpit on a top laid flat (Uniqlo). A garment chart is usually bigger than your body by the ease the design needs.

    Then use the measurement that decides the fit for that garment: see which measurement decides the size.

    You should see: one size on the chart that matches the measurement that matters most for the garment.

Where brands put the waist

SourceWhere it puts the waist
NMSU Extension (sewing)"Where the belt should be"
Uniqlo (women)Halfway between the bottom of the ribs and the top of the hips
Levi'sYour natural waistline, just above the belly button

Which measurement decides the size

GarmentMeasurement that decides the size
Tops, dresses, jackets, coatsBust (women) or chest (men) (Simplicity)
Trousers and most skirtsHips (Simplicity), then waist; inside leg for the length
JeansWaist and inside leg (Levi's chart uses both)
Babies and small childrenHeight: EN 13402 sizes infants by body height alone

How to tell your numbers are right

  • You measured over well-fitting underwear, standing normally (NMSU Extension).
  • The tape was snug but not tight, and level all the way round (NMSU Extension).
  • The hip measurement is round the widest part, usually 15 to 25 cm below the waist (NMSU Extension).
  • Every number is written down with the date (NMSU Extension).
  • You know whether the brand's chart gives body or garment measurements (Uniqlo).

If the size still doesn't fit

What happensWhat it meansWhat to do
Your numbers fall in two sizesYour shape differs from the brand's chartGo by the measurement that decides the size (see the table above), and have the rest altered if needed (Simplicity)
The numbers look wrongThe tape was probably twisted, tilted at the back, or pulled tightMeasure again with a helper
The sewing pattern size is bigger than your shop sizePattern companies use their own body chartsIgnore your shop size; Simplicity says your pattern size may be one or two sizes bigger

Before washing new clothes, check the care label so they don't shrink: see how to read clothing care labels.

Questions readers ask

Should I measure over clothes?

No. NMSU Extension says to measure over well-fitting underwear. Thick clothes can add a size.

I'm between two sizes. Which do I pick?

Use the measurement that matters most for that garment: bust or chest for tops and jackets, hips for trousers and most skirts (Simplicity). Then check the other measurements against the chart and alter where needed.

Why is my sewing pattern size bigger than my shop size?

Pattern companies use their own body charts. Simplicity says your pattern size may be one or two sizes larger than your ready-to-wear size, so always go by your measurements, not the number you usually buy.

How do I convert inches and centimetres?

One inch is 2.54 cm. European size labels under EN 13402 use body measurements in centimetres.