How many measurements do I need to make a sewing pattern?

For most garments, seven or eight: bust, waist, hip, back width, back length, arm length, rise, and leg length.

Do I need to take measurements if I buy a ready-made pattern?

Not to produce the standard size range, because the pattern already comes graded. They help you decide which size fits each customer and adapt the pattern if your brand has its own size chart.

How to take body measurements

What you take from this lesson: Take a reliable, repeatable set of measurements that gives the same result twice in a row.

The measurements you actually need

You don't need thirty measurements. For most garments, seven or eight are enough, and what matters is not how many you take but that they are taken correctly.

Bust (chest) circumference: at the fullest part, with the tape horizontal and the arms relaxed at the sides.
Waist circumference: at the narrowest part of the torso, without pulling the tape tight.
Hip circumference: at the fullest part, about 20 cm below the waist.
Back width: from one shoulder bone to the other, across the back.
Back length: from the base of the neck to the waist.
Arm length: from the shoulder bone to the wrist, with the arm slightly bent.
Rise: sitting, from the waist to the chair.
Leg length: from the waist to wherever the pants should end.

How to position the tape

The tape should rest on the body, neither tight nor loose. The test is simple: if you can slide a finger between the tape and the body with a little resistance, it is right.

The tape has to stay horizontal all the way around. The most common mistake is letting the tape sag at the back: the measurement comes out larger than the real one and the garment ends up too wide in the back.

The person should stand naturally, with the arms at the sides and without puffing out the chest. If they stand up straight "for the photo," the measurements won't work for the clothes they wear the rest of the day.

What to wear when measuring

Wear light, close-fitting clothing, or measure directly over underwear. Measuring over a sweatshirt adds five centimeters that later show up as extra ease in the finished garment.

If the garment will be worn over another one, such as a jacket, you don't solve that by measuring with the sweatshirt on. You solve it by adding ease on purpose in the pattern.

Record and double-check

Write each measurement down right away, not at the end. And it's worth taking the three main ones (bust, waist, hip) twice: if the second reading differs from the first by more than a centimeter, something was done differently and you need to repeat it.

That thirty-second check prevents the hardest problem to diagnose in patternmaking, which is a garment that turns out wrong and nobody knows why.

Common mistakes

Pulling the tape tight "so the garment fits closely": ease is set in the pattern, not by squeezing the tape.
Measuring over thick clothing.
Letting the tape sag at the back when measuring circumferences.
Taking arm length with the arm fully straight: once the arm bends, the sleeve ends up too short.

In short

Seven or eight well-taken measurements are enough. The tape rests on the body and stays horizontal, you wear light clothing, and you take the three main measurements twice to check them.

Frequently asked questions

How many measurements do I need to make a sewing pattern?: For most garments, seven or eight: bust, waist, hip, back width, back length, arm length, rise, and leg length.
Do I need to take measurements if I buy a ready-made pattern?: Not to produce the standard size range, because the pattern already comes graded. They help you decide which size fits each customer and adapt the pattern if your brand has its own size chart.