"Garment Measurement Spec Sheet: POMs and Tolerances Guide"

Garment Measurement Spec Sheet: How to Write POMs and Tolerances A garment measurement spec sheet gives a factory a measurable definition of fit. It tells the sample room where to measure, what each size should measure and how much deviation is acceptable. Without it, a factory may produce a garment that looks close to the sketch but fits differently from the intended style. This guide focuses on the working details: points of measure (POMs), finished garment measurements, size grading and tolerances. ## Start with finished garment measurements Your spec sheet should normally state **finished garment measurements**, not body measurements. Finished measurements describe the garment after sewing and finishing, laid flat or measured as specified. For example, a wearer with a 90 cm chest does not necessarily wear a garment with a 90 cm chest. Ease—the difference between body size and garment size—changes depending on silhouette, fabric stretch and intended fit. Before filling the size grid, decide: - Is the style slim, regular, relaxed or oversized? - Is the fabric woven, knit or stretch? - Which base size is being fitted first? - Are the measurements taken flat, around the body, or on a stretched garment? Write those conditions into the spec sheet notes so the sample room reads the numbers in the correct context. ## What is a point of measure (POM)? A point of measure is a named and numbered location on a garment where a measurement is taken. POMs remove ambiguity. “Chest” is not enough; “half chest, 2.5 cm below armhole, measured flat” is repeatable. Each POM should have: 1. A unique number or code. 2. A clear name. 3. A written measuring method. 4. A callout on a technical flat or measurement diagram. 5. A value for every size in the range. ## Common POMs for a sweatshirt | POM | Measuring method | |---|---| | 1. Half chest | Measure flat 2.5 cm below armhole, straight across | | 2. Body length | High-point shoulder to bottom edge of hem | | 3. Sleeve length | Shoulder seam to cuff edge along outer sleeve | | 4. Bottom opening | Measure flat across rib hem without stretching | | 5. Neck width | Seam to seam across neckline, laid flat | | 6. Bicep | Measure flat 2.5 cm below armhole | The measurement diagram matters as much as the table. It ensures the same POM is measured the same way by the brand, pattern maker, sample room and QC team. ## Build a practical size grid Place POMs in rows and sizes in columns. Add a tolerance column at the end. For a first sample, you may only need the base size. For production, include the full graded size range. | POM | Description | S | M | L | Tolerance | |---|---|---:|---:|---:|---:| | 1 | Half chest | 54 cm | 57 cm | 60 cm | ±1 cm | | 2 | Body length | 68 cm | 70 cm | 72 cm | ±1 cm | | 3 | Sleeve length | 62 cm | 63 cm | 64 cm | ±0.5 cm | Use the same unit throughout the document. Centimetres are common in global apparel production; inches can be used if the factory and brand agree. Avoid mixing them in the same grid unless the conversion is clearly managed. ## How to choose garment tolerances Tolerance is the acceptable variation between the spec and the measured sample or bulk garment. It is not a target. A tolerance of ±1 cm on a 54 cm half-chest means a result between 53 cm and 55 cm may be acceptable, provided the garment also meets the agreed construction and appearance standard. Choose tighter tolerances for small or high-impact measurements, such as collar opening or pocket placement. Broader tolerances may be needed for large dimensions, washed garments, stretch fabrics or handmade processes. Do not copy a generic tolerance table without considering the style. Ask the factory which measurements are difficult to control and agree on the exceptions before bulk production. ## Keep measurement method and sample stage visible A spec sheet is clearer when it shows the sample stage and condition: - Proto sample: confirm silhouette and construction. - Fit sample: confirm base-size measurements and ease. - Size set: review graded sizes. - Pre-production sample: confirm approved materials and final specifications. Add a column for “found measurement” when reviewing a sample. This makes comments concrete: the factory can see the spec, actual result, tolerance and required action in one place. | POM | Spec | Found | Tolerance | Required action | |---|---:|---:|---:|---| | Half chest | 57 cm | 55.5 cm | ±1 cm | Pass | | Body length | 70 cm | 68 cm | ±1 cm | Increase 1 cm; resubmit | ## Avoid these common spec-sheet mistakes ### Using body measurements as garment measurements This creates unexpected fit because ease is not documented. Label the type of measurement and add a fit note. ### Naming a POM without a method “Sleeve length” can be measured from several starting points. Use a diagram and a full description. ### Forgetting tolerances Without a tolerance, every minor variance becomes a negotiation. With an agreed tolerance, QC decisions are faster and more consistent. ### Changing measurements outside the tech pack If a fit change is approved in a call, email or chat, add it to the spec sheet and revision history before the next sample is cut. ## Use ThreadPack to keep fit data connected ThreadPack helps teams keep POM diagrams, graded measurement tables, sample comments and revisions in the same production record. That makes it easier to compare what was specified with what the factory delivered—without searching across spreadsheets, PDFs and message threads. FAQ ### What is POM in fashion? POM means point of measure: a defined location and method for measuring a finished garment. ### What is the difference between a size chart and a spec sheet? A consumer size chart helps customers choose a size. A production spec sheet gives the factory detailed finished garment measurements, methods, grading and tolerances. ### Should a factory create the grading? It can, but the brand or technical designer should review and approve it. Grading affects fit across the entire size range.