Points of Measure in a Tech Pack: A Beginner's Guide

Points of measure (POM) are the specific spots on a garment where a factory takes a measurement — chest width, sleeve length, hem opening — each with a target number and an allowed tolerance. The points of measure in a tech pack are how you tell a factory the exact finished dimensions of the garment you designed, so the sample comes back fitting the way you intended instead of however the factory guessed. If your bill of materials says what the garment is made of, points of measure say how big every part of it should be.

If you’re still getting oriented on the larger document, start with our overview of what a tech pack actually is, then come back here for the measurement detail.

What are points of measure in apparel?

A point of measure is a single, named dimension on the garment and the rule for how to measure it. “Chest width, 1 inch below armhole, laid flat” is a point of measure. So is “sleeve length from center back neck.” Each one is a line on a chart with a target value (the number you want) and a tolerance (how far off the factory is allowed to be and still pass).

The key word is garment, not body. Points of measure describe the finished, sewn product lying flat on a table — not the person who wears it. That difference trips up almost every new designer.

POM vs. a size chart: what’s the difference?

A size chart lists body measurements — the chest, waist, and hip of the customer you’re designing for. Points of measure list garment measurements — the actual fabric dimensions the factory cuts and sews to. The two are never identical, because of ease: the extra room added on top of the body so the garment isn’t skin-tight. A relaxed t-shirt for a 38-inch chest might have a 44-inch garment chest. That 6 inches of ease is a design decision, and POM is where you record it.

	Size chart	Points of measure
Measures	The body	The garment
Audience	Your customer	Your factory
Includes ease?	No	Yes

How do you measure a garment for a tech pack?

Here’s the workflow I’d give a designer building their first POM chart, working from a sample or a garment you already own and like the fit of:

1. Lay the garment flat and smooth. Always measure flat, on a hard surface, with the garment relaxed — never stretched or bunched. Half-measurements (like chest measured across one side) are standard; just be consistent and label them.
2. Pick the points that matter. Measure every dimension that affects fit: chest, waist, hip, shoulder, sleeve length, sleeve opening, body length, neck width, hem opening. Skip dimensions that don’t change the fit.
3. Define each point precisely. “Body length” is ambiguous — from the high point of the shoulder, or from the back neck? Write the exact start and end point for each measure so the factory can’t interpret it two ways.
4. Record the target value. The finished measurement you want, in your chosen unit. Pick inches or centimeters and use it everywhere; mixing units is a classic sampling error.
5. Set a tolerance per point. A small allowed range, like ± 1 cm on lengths and ± 0.5 cm on smaller details. Tolerance acknowledges that fabric and people aren’t perfectly precise — it tells the factory what “close enough” means.

A clear POM chart usually pairs the numbers with a measurement diagram: a simple technical sketch with letters (A, B, C) pointing at each measure, so the factory sees exactly where “A — chest width” is taken. Numbers plus a diagram leave almost no room for misreading.

Why points of measure decide your fit

The factory cannot see the fit in your head. They sew to the numbers you give them, full stop. If your POM is vague or missing, the sample comes back at whatever proportions the pattern maker assumed — and you’ve burned a sampling round discovering that “a bit oversized” meant something very different to them than to you.

Precise points of measure also make your fit repeatable. When you reorder, or move to a second factory, the same POM chart produces the same garment. Without it, fit drifts every production run. And during quality control, tolerance is what lets a factory accept or reject finished units objectively, instead of arguing about whether a sleeve is “too long.”

This is also where grading comes in — scaling your base-size POM up and down to create your full size range. You measure and perfect one size (your sample size, often a medium), then grade the rest from it. Getting the base POM right first is what makes grading clean later.

A quick checklist before you send POM to a factory

• Every measure is named and has a clear start and end point.
• One unit of measurement throughout (inches or centimeters).
• A target value and a tolerance on every line.
• A measurement diagram with letters matching the chart.
• Half- vs. full-measurements are labeled and consistent.
• The sample size is identified, with grading rules if you’ve graded.

Points of measure work hand in hand with the rest of the spec. The bill of materials defines your fabrics and trims, the construction page defines the stitches, and POM defines the dimensions — change one and you often touch the others, so keep them in sync as the design evolves. For a sense of how this looks on a real garment, our t-shirt tech pack page shows the kind of measurement detail factories expect even on a simple piece.

FAQ

What does POM stand for in fashion? POM stands for points of measure — the specific spots on a garment where a factory takes a measurement, each with a target value and an allowed tolerance. Together they define the finished fit.

How many points of measure does a garment need? It depends on the garment. A simple t-shirt might need 8–12, while a structured jacket can need 30 or more. The rule is to measure every dimension that affects fit, and skip the ones that don’t.

What is tolerance in a points of measure chart? Tolerance is the acceptable margin of error on each measurement, like plus or minus 1 cm. It tells the factory how close to the target value a finished garment must land to pass inspection.

Is points of measure the same as a size chart? No. A size chart shows body measurements for the customer, while points of measure are garment measurements the factory sews to. The two are related but never identical, because of ease and seam allowances.

---

You don’t have to build a POM chart from scratch. techpacks.app turns a sketch into a complete, factory-ready tech pack — points of measure, diagram, and tolerances included — built to a real factory standard. If you’re early in launching a line, our guide for independent designers walks through the whole path. Preview your first pack and see your garment’s measurements laid out properly.