The conclusion first: knit versus woven is a difference of structure, not of hand-feel. Knit is formed from interlinked loops, so stretch is inherent; woven is formed from interlaced warp and weft, so dimensional stability is inherent. Those two natures propagate all the way into pattern, machinery, costing and acceptance. Choose the wrong one and the problem rarely surfaces at sampling — it surfaces after the bulk wash or after the customer wears it.
1. Stretch and recovery: the root difference
Whether a knit recovers after being stretched, and by how much, depends on the structure (single jersey, rib, warp knit) and the elastane content. That decides three things:
- Ease in the pattern: knit tops usually carry less circumference ease because the fabric supplies the stretch. Pattern a knit using woven ease and the garment hangs loose and shapeless.
- How it fits: knit follows the body (bodycon knit dresses, base layers); woven shapes through darts and structural seams (tailoring, shirting).
- Recovery requirement: necklines, cuffs and hems take repeated strain; insufficient recovery means they go slack — one of the leading causes of returns in knitwear.
A common misjudgement: "if it stretches, it is knit" does not hold. Woven fabric can also contain elastane to make four-way stretch (common in comfort trousers and tailoring), yet its stretch direction and extent are nothing like a knit's. Judge by structure, not by how it pulls. On the order, state "structure + stretch direction (warp/weft/both) + recovery rate" — far more useful than "stretchy".
2. Silhouette and fit: can this style even be made
| Dimension | Knit | Woven |
|---|---|---|
| How shape is created | Fabric following the body and recovering | Darts, panel seams, interlining and structure |
| Circumference ease | Less (fabric supplies stretch) | More (movement and structure allowance) |
| Typical pattern challenge | Neckline and armhole distortion, needs stabilising | Many structural seams; more drafting and grading work |
| Grading | Different increments; must be set per knit spec | Graded on an established increment system |
| Typical categories | T-shirts, sweatshirts, knitwear, knit dresses, base layers, rib tops | Shirts, tailoring, trousers, skirts, outerwear, woven dresses |
The test is direct: does this garment fit through the fabric's own stretch, or through cut and structure? The first is knit, the second woven. If it needs both, you are in blend, interlock or panel territory — see section 5.
3. Weight basis and consumption: where quotes diverge
This is the section most often mis-costed, because the two use different measurement languages.
- Knit: usually described by weight in g/m² (gsm), and in English-language markets also oz/yd². Because knit stretches and its width is often expressed as tube diameter or open width, it is frequently quoted per kilogram and then converted to consumption per garment.
- Woven: usually described by weight plus thread density, and quoted per metre or yard, with consumption taken from the marker.
Unit conversion is the classic trap. 1 oz/yd² ≈ 33.9 g/m², so "10 oz sweatshirting" is about 339 g/m². When knit is quoted by the kilogram, you must lock weight and width together — otherwise "the same kilogram price" can correspond to very different consumption per piece. State weight in g/m² throughout the contract, with the conversion and the tolerance (commonly ±5%).
4. Sewing and machinery: not the same machines
- Knit: dominated by overlock and coverstitch and by stretch stitches on a lockstitch, because the seam itself must extend with the fabric. Necklines and shoulder seams are usually stabilised with tape or binding; hems and cuffs use coverstitch or twin-needle. Different equipment from a woven line.
- Woven: dominated by plain lockstitch, overlocking and dedicated machines for pockets and collars. Structural components (collar, placket, pockets) are operation-heavy and demand higher-grade machinists.
- Why it matters: a knit line and a woven line are normally two sets of machines and two sets of operators. A garment that needs a "knit body with a woven placket" usually requires two workshops to collaborate — negotiate lead time and cost on that basis, not as a single-line job.
5. Blends, interlocks and panels: three compromise routes
- Blend — two or more fibres in the same yarn (cotton/poly, cotton/modal). This changes hand-feel, cost and shrinkage, but not the structure: a knit is still a knit.
- Interlock / bonded — two structures or two layers combined, taking the form of one and the performance of the other. Common in sportswear and functional womenswear.
- Panel — different structures at different parts of one garment, such as a knit body with a woven placket, or a woven skirt with a knit waistband. The most practical compromise in womenswear, but the shrinkage difference between the parts must be measured at sampling, or the seam will ride after washing.
The number-one risk in panelled garments is differential shrinkage. Knit and woven shrinkage are usually not in the same range, so after washing the more shrinkable side distorts the seam. The method: test both materials for dimensional change at sampling, per GB/T 8629 or ISO 6330, and pre-shrink or adjust the pattern on the basis of the higher-shrinking one — rather than reworking once bulk is out.
6. Shrinkage, setting and acceptance: different standards
| Item | Knit | Woven |
|---|---|---|
| Shrinkage focus | Lengthwise shrinkage and recovery; growth or shortening after wash | Warp and weft shrinkage; dimensional stability |
| Common control | Pre-shrinking, heat setting, tension control | Sanforizing; warp and weft controlled separately |
| Typical test | GB/T 8628 + GB/T 8629, ISO 6330 (including drying method) | As above, plus re-measurement of density and width |
| Typical defects | Dropped stitches, holes, needle lines/skew, barré, pilling | Broken ends and picks, skew, shade variation, warp streaks |
| Weight tolerance | Commonly ±5% (knit variation often wider) | Commonly ±5% |
The key to acceptance is writing the test method into the order: water temperature, detergent, whether machine washed, and the drying method can each move the shrinkage result by a grade. The logic is exactly the same as for fabric specifications — item, value, tolerance, test method, all four. For wording, see writing fabric specs into a contract.
7. A decision table: which category takes which
| Category | Usual choice | Why |
|---|---|---|
| T-shirts / sweatshirts / knitwear | Knit | Needs fit and recovery; high movement |
| Base layers / bodycon knit dresses | Knit | Fit comes from the fabric itself; little ease |
| Shirts / tailoring / outerwear | Woven | Needs structure and a defined silhouette |
| Trousers / skirts | Woven (comfort versions with four-way stretch) | Stability first, stretch as a comfort bonus |
| Woven dresses / abayas | Woven (Nida, crepe, satin) | Drape and silhouette need structural stability |
| Sportswear / functional | Knit or interlock | Stretch, breathability and moisture management are the point |
Where LIUYU sits: a womenswear development and production factory in Guangzhou, working in both knit and woven, with an in-house pattern room and 80+ production staff, having served 307 clients across 59 countries. We handle pure knit or pure woven styles, and also cross-workshop pieces such as a knit body with woven panels. From about 50 pieces per style, first samples in about 3–5 days and bulk in about 10–20 days. Send the sketch and we will first assess structure and shrinkage risk, then come back with consumption and price.
Moving the "knit or woven" question ahead of pattern making saves an entire downstream cycle: wrong silhouette, incompatible sewing, shrinkage over tolerance, ridged seams. Get the structure right and every step after it gets easier.
Frequently asked
- How do I quickly decide whether a garment should be knit or woven?
- Ask one question: does it fit through the fabric's own stretch, or through cut and structure? If it relies on the fabric, it is usually knit (T-shirts, knitwear, base layers, bodycon knit dresses). If it relies on structure, it is usually woven (shirts, tailoring, trousers, skirts, abayas). If it needs both, go to a blend, interlock or panel approach and handle differential shrinkage separately.
- Why are knit and woven quoted differently?
- Because they use different measurement languages. Knit is usually described by weight (g/m² or oz/yd²), with width given as tube diameter or open width, and often quoted per kilogram then converted to consumption per garment. Woven is described by weight plus thread density and usually quoted per metre or yard, with consumption taken from the marker. When quoting by kilogram, lock weight and width together — the same kilogram price can mean very different consumption.
- How many g/m² is 1 oz/yd²?
- About 33.9 g/m². So a common "10 oz sweatshirting" is roughly 339 g/m². In contracts it is best to state weight consistently in g/m² with the conversion and a tolerance (commonly ±5%), which prevents a full grade of thickness being mis-costed across languages.
- Can one factory do both knit and woven?
- The machinery and operators are normally two separate sets, so pieces like a knit body with a woven placket often require two workshops to collaborate. Order lead time and cost should be negotiated on that basis rather than as a single-line job. When selecting a factory, it is fair to ask directly whether both knit and woven capacity is in-house and who owns communication on panelled styles.
- What goes wrong most often on panelled garments, and how do you prevent it?
- Most commonly differential shrinkage distorting the seam after washing. Prevent it by testing both materials for dimensional change at sampling (for example GB/T 8629 or ISO 6330) and pre-shrinking or adjusting the pattern on the basis of the higher-shrinking one. Also write each material's composition, weight, shrinkage and shade into the order as item, value, tolerance and test method.