Cut and sew is the way most garments are made: fabric is produced first, as rolls of knit or woven cloth, then the garment’s panels are cut from it using a pattern and sewn together. It is different from knitting a garment, or its panels, directly to shape. Most T-shirts, hoodies, leggings, sports bras and boxer briefs are cut and sew. It matters because fabric, pattern and sewing are separate steps, so each one can be specified, checked and changed, and each one is where much of the quality and cost of a garment is decided.
Cut and sew compared with knitting to shape
| Method | How it works | Typical products | Main limits |
|---|---|---|---|
| Cut and sew | Panels cut from rolls of fabric and sewn together | Tees, hoodies, leggings, underwear, shirts, trousers | Fabric waste around cut panels; seams can rub or fail if badly chosen |
| Fully fashioned knitting | Panels knitted to shape on flat knitting machines, then joined (linked) | Sweaters, cardigans, knit polos | Mainly for sweater-type knits; gauge and yarn limit the look |
| Seamless or whole-garment knitting | The garment, or a tube of it, is knitted in one piece with few or no side seams | Some underwear, shapewear, base layers, some sweaters | Development tied to specific machines; fit range and fabric choices narrower |
For underwear, the trade-off between the two is covered in seamless knit or cut-and-sew underwear.
The stages of cut and sew production
| Stage | What happens | What can go wrong |
|---|---|---|
| Pattern and grading | Panels are drawn for the base size and graded to the other sizes | Good sample size, poor fit in the largest and smallest sizes |
| Marker making | Pattern pieces are laid out to use the fabric width efficiently | Pieces placed off-grain twist after washing; poor layout raises fabric consumption |
| Fabric inspection and relaxing | Rolls are checked for faults and knits are allowed to relax before cutting | Faults cut into panels; unrelaxed knit shrinks after cutting |
| Spreading | Fabric is laid in layers (plies) on the cutting table | Tension stretches knits; rolls from different dye lots mixed in one garment |
| Cutting | Layers are cut by hand knife, straight knife or automatic cutter | Panels drift from the pattern in thick lays |
| Numbering and bundling | Panels are ticketed by size and ply and grouped for sewing | Panels from different plies or sizes sewn together, causing shade or size mix-ups |
| Sewing | Panels are joined, hemmed and finished on specialist machines | Wrong stitch type, puckering, skipped stitches, seams that crack when stretched |
| Trimming, finishing and pressing | Threads trimmed, labels and trims added, garment pressed | Untrimmed threads, misplaced labels |
| Inspection and packing | Garments measured and checked, then folded and packed | Defects reaching the customer if inspection is light |
For how fabric should be checked before cutting, see four-point inspection of knit rolls.
Stitches and seams: the language of cut and sew
ISO 4915 classifies stitch types into numbered classes, for example lockstitch (class 300), multi-thread chainstitch (class 400), overedge chainstitch (class 500) and covering chainstitch (class 600). ISO 4916 classifies seam types and is read together with ISO 4915. Using these numbers in a tech pack removes guesswork about how a seam should be made.
In knit garments you will commonly see:
- Overedge (overlock) stitches, such as 504 or 514, to join and neaten seams on stretch fabric.
- Covering stitches (class 600, often called coverstitch) for hems, cuffs and neckbands on tees and leggings, and flat seams on activewear where a raised seam would rub.
- Lockstitch (301) for labels, topstitching and areas that should not stretch.
Stretch matters: a stitch that cannot stretch as far as the fabric will crack when the garment is pulled on. Thread choice matters too; see core-spun or spun polyester thread.
Why cut and sew matters to a brand
- Choice of fabric. Almost any knit or woven fabric can be used, from fine jersey to heavy fleece, and fabric can be nominated or developed separately.
- Control of fit. Fit lives in the pattern and grading, which you can own and move between factories.
- Cost is visible. Fabric consumption comes from the marker, and sewing cost from the number and type of operations, so you can see where cost can be taken out.
- Quality can be checked step by step, from fabric inspection through inline checks to final inspection.
Knit-specific points to watch
- Relaxing before cutting: knit fabric stretched on the roll shrinks back after unrolling, so panels cut too soon can come out small.
- Shrinkage and twist: panels cut off-grain, or fabric with a lot of residual torque, can twist after washing; see tees shrinking in length but growing in width.
- Shade by roll: keep each garment’s panels from the same roll or dye lot.
- Grading on stretch fabric: check fit on a full size set, not just one sample; see knitwear sizing and grading.
Choosing a factory to do this work is a separate question; see what to know about cut and sew manufacturers.
Cut and sew at Knitwear Base
We offer cut-and-sew production for knit T-shirts, hoodies, underwear and sportswear. Tell us your fabric, seam and stitch requirements through our contact page, or see how we handle quality control.
Sources and further reading
- ISO 4915:1991, Textiles: Stitch types, classification and terminology
- ISO 4916:1991, Textiles: Seam types, classification and terminology
Rules and standards are summarised from their official pages for general guidance; this is not legal advice. Check the current version and the requirements of your own market before you rely on them.
