What Is a Garment Spec Sheet? Example and Free Template
A garment spec sheet records a product's measurement specifications: the points of measure, how each one is taken, the target value in every size and the tolerance the factory is allowed. It lets a brand and a manufacturer measure the same dimension in the same way and agree on whether a sample passes. It is usually part of a larger tech pack, not a substitute for the whole document.
The general meaning is the same in any industry: a specification sheet lists the properties a product must meet. In apparel, "spec sheet" almost always means the measurement sheet, and that is the document this guide covers.
An editorial illustration of the measurement being taken. The sheet it belongs on is shown below, from a real export.
Download the free garment spec-sheet template in Excel and PDF →
Table of Contents
- Which fields belong in a spec sheet?
- A real spec sheet from a finished tech pack
- Grade rules and tolerance are different numbers
- How is it different from a tech pack or a size chart?
- How to complete the template
- The spec sheet inside Adstronaut AI
- Frequently asked questions
Which fields belong in a spec sheet?
| Field | Why it matters |
|---|---|
| Style and revision | Identifies the product and which instruction is current |
| Base size | Establishes the size whose target values you start from |
| Units | Keeps inches and centimetres from being mixed |
| Point of measure (POM) | Names the dimension being specified |
| Measurement method | Defines endpoints, flat or circumference, and any stretch state |
| Target values | States what each size should measure |
| Grade increments | Explains how the target changes between sizes |
| Tolerance | Defines the allowed deviation from a target |
| Source and review status | Distinguishes measured facts, design targets and assumptions |
"Chest: 54" is incomplete. Is it a flat garment width or a body circumference? In which unit and size? Where below the armhole is the width taken? A method should be repeatable by another person.
Add a labelled drawing showing the measurement route wherever words are not enough, and make sure the label in the drawing matches the row in the table. Do not ask an image generator to invent a measurement chart and then treat the resulting numbers as specifications.
A real spec sheet from a finished tech pack
This is the measurement specification of a men's navy utility overshirt, generated in Adstronaut AI from two photos and edited before export. The drawing carries the method; the table carries the targets.
Pages 2 and 3 of the overshirt export, unchanged. Thirty points of measure; five of them below.
| Point of measure and method | Tolerance | XS | S | M (base) | L | XL |
|---|---|---|---|---|---|---|
| Body length, HPS to bottom hem edge | ±1.0 cm | 61.0 | 62.5 | 64.0 | 65.5 | 67.0 |
| Chest width, 2.5 cm below armhole, seam to seam | ±1.0 cm | 54.0 | 56.0 | 58.0 | 60.0 | 62.0 |
| Cross shoulder width, shoulder point to shoulder point across back yoke | ±0.8 cm | 45.6 | 46.8 | 48.0 | 49.2 | 50.4 |
| Cuff width, cuff opening edge to edge, relaxed | ±0.3 cm | 12.9 | 13.2 | 13.5 | 13.8 | 14.1 |
| Hem band height, top of hem band seam to bottom edge | ±0.3 cm | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 |
Three things to notice. Every row names its method, so the factory measures the chest 2.5 cm below the armhole rather than wherever the tape lands. Every row grades differently: the chest moves 2 cm per size, the body length 1.5 cm, the cross shoulder 1.2 cm, the cuff 0.3 cm and the hem band not at all. And every row has its own tolerance, tighter on small trims than on the body. Open the full PDF to read all thirty rows, or see how the chart was built in the grading guide.
Grade rules and tolerance are different numbers
The grade increment says how a target changes from one size to the next. The tolerance says how far a made sample may sit from the target and still pass. They are often confused because both are small numbers in centimetres.
Take the medium chest above: the target is 58 cm with a tolerance of ±1 cm, so a sample measuring 57.0 to 59.0 cm passes that row. The large is 60 cm because the grade rule adds 2 cm, not because the tolerance was applied twice.
Passing one measurement does not establish the garment's fit or approve the sample. Fit review on a physical sample remains separate work.
How is it different from a tech pack or a size chart?
A measurement spec sheet answers "what should this dimension be, and how do we measure it?" A tech pack also communicates drawings, materials, construction, artwork and other product-specific instructions. In the overshirt document above, the spec sheet is three of fourteen pages.
Some teams use "spec sheet" to describe a broader product specification. Confirm what the receiving factory expects. Do not assume a measurement table communicates lining, seam construction, trim quality or artwork placement.
A customer-facing size chart has another purpose: helping shoppers choose a size. It lists body measurements; the spec sheet lists finished-garment measurements. Do not copy one into the other without accounting for the method and the fit intent. The free size chart generator builds the customer-facing version.
How to complete the template
The printable PDF, rendered unchanged. The Excel workbook carries the same rows with live formulas.
Open the free Excel workbook. The first sheet is for your style; the second contains a worked example. Enter the base measurements and separate grade increments. The adjacent-size formulas stay blank until their numeric inputs are supplied, and changing the unit label does not convert the values.
Use the printable PDF for an offline review. In either file, replace irrelevant POMs, define missing methods and identify who supplied or reviewed each specification. Extend the three-size example carefully for your actual size run.
The spec sheet inside Adstronaut AI
If you would rather not build the table by hand, the AI tech pack generator produces it from a product photo and lets you correct any value in place.
The same thirty rows as the PDF above, in the editor. Click a value to change it and the grade follows; switch the sample size, the sizing system or centimetres and inches from the controls at the top.
Start from your reference photos, supply the measurements you already know, and check the proposed values against your design targets or a physical sample before you export. The tech-pack tutorial walks through that step.
Start a tech-pack preview for your product →
Frequently Asked Questions
What does a spec sheet mean in fashion?
The measurement specification for a garment: each point of measure, its method, the target for every size and the tolerance. In other industries a spec sheet can list any required property; in apparel it means this table.
What is the difference between a spec sheet and a size chart?
A spec sheet lists finished-garment measurements for the factory. A size chart lists body measurements for the shopper. They use different methods and should never be copied into each other.
Is a spec sheet a sewing pattern?
No. It records specifications. A pattern defines the pieces used to construct the product; fitting and pattern development are separate work.
Can AI infer my exact size table from a photo?
Not reliably from the image alone. Supply measured values or reviewed targets and keep inferred assumptions visible. An orderly table is not evidence of actual dimensions.
Is there one tolerance for every garment?
No. Set tolerances for the material, construction and point of measure with the relevant technical and manufacturing team. The overshirt uses ±1 cm on the body and ±0.3 cm on the cuff and hem band.
Does the free template include a full tech pack?
The spec-sheet download covers measurements. The tech-pack library provides broader sample documents and a blank full-pack workbook.
Further reading
- Techpacker: garment specification sheets — measurement-sheet context.
- How to create a tech pack — the complete preparation workflow.
- Manufacturer handoff checklist — what to send with the document.