How to Take Accurate Body Measurements for PDF Sewing Patterns
Here's something we tell every buyer: a five-dollar tape measure used correctly will improve your results more than any fancy tool. Most fitting problems we see aren't pattern problems — they're measurement problems. The tape was too loose, the waist was measured in the wrong spot, or the numbers were taken over a bulky sweater.
Taking ten careful minutes with a tape measure is the highest-value sewing skill there is. Here's how to do it right.
What you need
- A flexible tape measure — the soft fabric kind, not a metal construction tape.
- A mirror — so you can check the tape sits level without twisting yourself into a pretzel.
- A helper if possible — some measurements (back length, shoulder width) are genuinely hard to take on yourself. Ask a friend or family member.
- A pen and paper — write everything down immediately. Numbers evaporate.
Wear what you'd wear under the garment — usually a thin shirt and nothing bulky. No shoes for height. Stand relaxed and straight; don't suck in your stomach (we know, we all do it — the pattern won't fit the fantasy version).
The measurements that actually matter
Not every pattern needs every measurement, but these are the core set. Always read the pattern's size chart page first — it tells you exactly which of these your specific pattern uses.
Bust / chest
Wrap the tape around the fullest part of your chest, keeping it level all the way around your back. The mirror is essential here — it's the measurement most people let droop in the back. Breathe normally.
Waist
This is the natural waist — the narrowest point of your torso, usually around the belly button or slightly above. Not where your jeans sit. Tie a bit of string or elastic around your waist and let it settle; that's the natural waistline. Measure over the string.
Hip
Around the fullest part of the hips and seat, tape level all around. For hip-length garments like cloaks and coats, this is a key fit point.
Back length
From the prominent bone at the base of your neck down to your natural waist. Get a helper for this one — guessing is how jackets end up too short in the back.
Shoulder width
Bone to bone across the back, from one shoulder point to the other. This is where leather garments are least forgiving, so measure it carefully — and if you're between sizes on a jacket or vest, the shoulder is usually the measurement to prioritize.
Arm length
Bend your elbow slightly and measure from the shoulder point, over the elbow, to the wrist bone. The slight bend accounts for how sleeves actually sit when you move.
Common mistakes (we see them all)
- Measuring over bulky clothes. That thick hoodie adds an inch or two. Thin layer only.
- Pulling the tape too tight or letting it sag. The tape should be snug but you should be able to slip a finger underneath. Think "firm handshake," not "tourniquet."
- Letting the tape tilt. Especially at the back for the bust measurement. The mirror isn't optional — it's the tool.
- Rounding to nice numbers. Write down what the tape actually says. Patterns are drafted in real numbers, not nice ones.
- Using old measurements. If your last measuring session was a year ago, measure again. Bodies change; ten minutes is cheap.
Between sizes? Here's what to do
Almost everyone falls between sizes somewhere. Don't panic — that's normal, and it's exactly what patterns are built to handle.
For tops, vests, and jackets: choose by your chest/bust measurement first, then check the shoulder. Shoulders are hard to alter, so when in doubt, size up and take in the body rather than sizing down and struggling with tight shoulders.
For waist-focused garments (belts, corset-style pieces): the waist measurement leads.
For cloaks and capes: these are forgiving by design — height and shoulder width matter more than anything, and most have generous ease.
If you're between sizes on every measurement, go up — it's far easier to take a seam in than to add fabric that isn't there. And if you want the fuller picture on picking sizes from our charts, read our guide on how to choose your size in PDF sewing patterns.
One last habit
Keep your measurements in your phone notes with the date. Update them whenever you start a new project. Future-you will be grateful — and every pattern you sew will start from accurate numbers instead of guesswork.
Now that you've got solid measurements, you're ready to sew with confidence. Browse the pattern collection — every pattern includes a detailed step-by-step sewing guide, and our size charts work from exactly the measurements in this article.