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 Abu Bakar SaadatPublished 28 October 20265 min readPublisher: Saadat Rafiq
✓ Reviewed by Muqadas Fatima, BFA · 28 October 2026
IllustrationAt 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
Measure round the fullest part of the bust or chest.

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.
Measure your waist 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.
Measure round the fullest part of your 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).
Measure the inside leg (inseam).

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

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
| Source | Where 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's | Your natural waistline, just above the belly button |
Which measurement decides the size
| Garment | Measurement that decides the size |
|---|---|
| Tops, dresses, jackets, coats | Bust (women) or chest (men) (Simplicity) |
| Trousers and most skirts | Hips (Simplicity), then waist; inside leg for the length |
| Jeans | Waist and inside leg (Levi's chart uses both) |
| Babies and small children | Height: 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 happens | What it means | What to do |
|---|---|---|
| Your numbers fall in two sizes | Your shape differs from the brand's chart | Go by the measurement that decides the size (see the table above), and have the rest altered if needed (Simplicity) |
| The numbers look wrong | The tape was probably twisted, tilted at the back, or pulled tight | Measure again with a helper |
| The sewing pattern size is bigger than your shop size | Pattern companies use their own body charts | Ignore 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.
Sources
We base our articles on the makers' official documentation.
- New Mexico State University Extension: Check your pattern for proper fit, Guide C-220 (revised March 2015)
- New Mexico State University Extension: Selecting a pattern size for perfect fit, Guide C-205 (PDF, revised January 2015)
- Simplicity: Sizing (PDF)
- Uniqlo: About how to measure
- Levi's: Product size guide
- ISO 8559-1:2017 Size designation of clothes, Part 1: Anthropometric definitions for body measurement
- EN 13402-2:2002 Size designation of clothes, Part 2: Primary and secondary dimensions (SIST preview, PDF)

