Knit vs Woven Fabric: How to Tell Them Apart

Knit vs woven fabric: from structure to behavior

A woven fabric uses two sets of yarn at right angles, so it is more stable than a knit and its stretch is limited by yarn properties and weave structure. In a knit, the curved shape of the loops gives the fabric stretch of its own; that stretch also depends on the yarn and the knit structure (Dönmez, 2008). The table summarizes the everyday consequences.

Source key: Kentucky, Grain = Understanding Fabric Grain (2006); Kentucky, Knit = Sewing with Knit Fabric (2006); ISP 1009 = Cotton Incorporated, 2004; Pratt = Pratt Institute Textile Research Lab, Wovens. The table shows general tendencies; fiber, yarn, density and finishing change the behavior. This guide does not rank knit and woven by price or durability: both depend on fiber, yarn, density and finishing more than on structure.

How to tell knit from woven fabric: five checks

You can run the checks on a roll end, a swatch or the fabric inside a garment. The first three are enough for most fabrics; the fourth is supporting and the fifth is for laboratory confirmation. Do not trust a single result; look for at least three checks that point the same way.

1. Look at the yarn layout with a magnifier. In a woven fabric two sets of yarn run at right angles and pass over and under each other. In a knit, the yarn forms chains of loops; in a single-bed knit (such as single jersey) the front shows lengthwise columns of loops (wales) and the back shows crosswise rows of loops (courses) (Kentucky, Knit).
2. Pull lengthwise, crosswise and on the diagonal. A knit stretches by itself; in a weft knit the stretch is usually greater across the width, but not in every fabric, so test it before you buy (Kentucky, Grain). Without elastic yarn, a plain weave does not stretch in the main directions (Pratt); it gives on the diagonal (bias), most at 45° (Kentucky, Grain). Also see whether the fabric returns to its size when you let go: according to the Kentucky sewing guide, a knit that stays distorted after stretching will probably lose its shape in use (Kentucky, Knit).
3. Check the cut edge and the selvage. A woven fabric has a firm lengthwise edge, the selvage, running parallel to the warp (Kentucky, Grain). A single-bed weft knit (such as single jersey) curls at the cut end, runs and unravels (CottonWorks, Single & Double Knits); pulling the yarn of the last knitted row can unravel the fabric across its width (Dönmez, 2008). A circular knitting machine delivers fabric in tubular form (Dönmez, 2008; CottonWorks, Knit Basics).
4. Compare the two faces. In a single-bed knit the faces differ, while in plain weave they look alike (NPTEL). But interlock and 1×1 rib are knits that look the same on both faces, and interlock is also very stable and does not curl (CottonWorks, Single & Double Knits). “Both faces alike” is therefore not proof of a woven on its own.
5. If in doubt, count the density. Courses and wales per centimeter are determined by EN 14971 for knits, and the number of threads per unit length by ISO 7211-2 for wovens. If doubt remains, or you need density values for a specification, have a laboratory analyze the fabric.

Decision table by observation

The table gives probabilities, not verdicts. In a warp knit the stretch is expected to be greater in the direction of the wales (NPTEL; CottonWorks, Knit Basics). Double-bed knits are usually the same on both faces and their cut edge does not curl, but that does not mean they stretch little: the Kentucky guide counts interlock among medium-stretch knits, and rib can stretch up to 100% across the width (Kentucky, Knit).

What makes the call harder

• Stretch woven. According to the Pratt Institute, a plain-weave fabric does not stretch without elastic yarn; when elastic yarn is added it can stretch. The scope of EN ISO 13934-1 also mentions stretch wovens containing elastomeric fiber. Stretch alone therefore does not mean “knit”; the magnifier and the edge check decide.
• Stable knits. The University of Kentucky sewing guide treats “firm, stable knits” (double knit, sweatshirt knit, boiled wool, raschel) as a separate class: they stretch very little and are handled like woven fabrics. The same guide places interlock among medium-stretch knits. According to the guide’s indicative values, a stable knit stretches up to about 10%, a medium-stretch knit about 25–35%, a two-way stretch knit up to 50–75% and a super-stretch knit 100% or more; these are sewing-guide classes, not standards (Kentucky, Knit). The conclusion “if it does not stretch, it is woven” can therefore be wrong.
• Warp knits. Tricot and raschel are common warp knits (Kentucky, Knit); cut horizontally, they neither curl nor fray (CottonWorks, Knit Basics). An edge that does not curl does not mean the fabric is woven.
• Brushed surfaces. Flannel is a woven fabric that is brushed after weaving to raise the surface fibers (CottonWorks, Flannel). Fleece is a knit made with two or three yarns whose back loops are brushed; brushing changes the surface, not the knit structure (CottonWorks, Single & Double Knits). Brushing gives the surface cover and softness (CottonWorks, Flannel); because the nap can hide the yarn layout, look at an unbrushed face and at the cut edge.
• The name “penye” says nothing about structure. Penye is a Turkish trade word for a yarn type spun from combed cotton, not a fabric structure. Cotton Incorporated’s yarn bulletin for “knit and woven fabrics” classifies cotton yarns by spinning system (ring carded, ring combed, open-end and so on), so the yarn type does not determine the fabric structure (ISP 1006). The Turkish Language Association dictionary (TDK) defines penye as “a kind of fine fabric finished with a special tool in weaving”, while “penye products” are listed among knitted products (Marmaralı, 2004, cited in Dönmez, 2008). On a quotation, write the structure and the yarn separately; for T-shirt fabrics see T-shirt fabric types.

Which fabric for which product?

The table is a starting point based on the end uses named in the sources; the final decision is made on a sample and a pattern.

Four questions help you decide. Should the garment conform to the body or keep its pattern shape? Will the stretch come from the structure or from elastic yarn? How will the cut edge be finished? Will fabric need be calculated in kilograms or in meters? For summer garments the choice between knit and woven depends on more than structure; the combined effect of fiber, structure and weight is covered in breathable fabrics for summer.

What changes in production

Cutting and direction. A garment that is not cut and sewn in line with the fabric’s direction stretches in unwanted places and the hem sags; in woven fabric this direction is called grain, in a knit simply “direction” (Kentucky, Grain). Do not stretch a knit on the cutting table or let it hang off the table; its weight distorts it. The fabric is placed so that the greatest stretch runs around the body (Kentucky, Knit).

Shrinkage. According to Cotton Incorporated, because of processing tensions the delivered dimensions of greige fabric do not hold in later stages; the reference state is the relaxed dimension (ISP 1009). To find the shrinkage allowance, measure a swatch before and after washing; the shrinkage calculator does the arithmetic. State which condition a weight or width refers to; typical weights by product are in fabric weight for T-shirts, hoodies and joggers.

Sewing. In a knit the seam must stretch with the fabric or it will break. The Kentucky sewing guide names overlock (serger) and cover stitch machines, ball-point needles and differential feed, which prevents wavy seams. Because a knit does not fray like a woven, finishing the seam edge is optional; if the edge curls, it is finished with an overlock or two rows of stitching (Kentucky, Knit).

Ordering. Fabric need per garment is calculated in kilograms for knits and in meters for wovens (Sarkar, 2020); for a knit, state whether the width is open or tubular. Use the fabric consumption calculator for the need per garment and order, the meter-to-kg tool to convert between kilograms and meters, and the GSM calculator for weight, which also converts between g/m² and oz/yd².

In specifications and testing

The methods used for the same property differ partly between knits and wovens. The table follows EVS and BSI standard records as of this article’s date (October 2026); confirm the current edition with ISO, CEN or your national standards body before you write it into a contract.

On a quotation or in the tech pack, give the following.

• Knit: the knit type (weft or warp) and the fabric name, the fiber percentages, the yarn, the weight (and the state in which it was measured) and the width (open or tubular).
• Woven: the weave, the fiber percentages, the yarn, the warp and weft density, the weight and the width.

A single fabric name such as “poplin” or “penye” is not enough.

Customs treats them differently too. The first six digits of Turkey’s 12-digit customs tariff statistics position (GTİP) are the Harmonized System (HS) code (Republic of Turkey Ministry of Trade, Tariff FAQ). In the HS, Chapter 60 covers knitted or crocheted fabrics, Chapter 61 articles of apparel and clothing accessories, knitted or crocheted, and Chapter 62 articles of apparel and clothing accessories, not knitted or crocheted (Japan Customs, HS-based tariff, August 8, 2026 edition). So the same garment style falls in a different chapter depending on whether it is knit or woven. This is the position as of this article’s date; confirm the exact heading and duty for your market with your customs broker. If a classification is uncertain, binding tariff information (BTB) can be requested in Turkey; it is issued free of charge, although any analysis or expert costs are borne by the applicant (Ministry of Trade, Tariff FAQ).

Summary rule

Look at the yarn layout first, then at stretch and the cut edge; if all three point the same way, the result is very likely right. A knit is a good starting point for garments that conform to the body and wrinkle little, and a woven for garments that keep their shape, but stretch woven and stable knits blur the line. If you are looking for a fabric supplier, browse the knitted fabric and woven fabric categories in our company directory, and see fabric suppliers in Turkey for how to compare and order.