Knitting - Basic Stitches Fabric Structure

Structural Elements of Knitted Fabric Introduction Knitted fabrics are created by forming loops of yarn and connecting them to create a coherent textile. Understanding how these loops are structured, oriented, and manipulated is essential for identifying stitch types, predicting how a fabric will behave, and understanding the differences between knitting methods. This guide covers the fundamental building blocks of knitted fabric and the stitches used to create them. Basic Structural Concepts: Courses and Wales To understand knitted fabric, you need to know two key directional terms that describe how yarn moves through a knitted piece. A course is the horizontal path that a single yarn travels across one row of loops. As yarn is manipulated by needles during knitting, it creates a meandering line that runs from side to side. Think of a course as one complete horizontal journey across the fabric. A wale is a vertical column of loops. Each stitch in a wale is suspended from (and supports) the loop directly above and below it, creating a chain-like vertical structure. If you look at a knitted fabric and trace your finger straight up, you're following a wale. This distinction matters because it helps you understand fabric behavior and identify different stitch patterns. The orientation of courses and wales differs between weft knitting and warp knitting, which we'll explore next. Weft Knitting vs. Warp Knitting The fundamental difference between these two knitting methods lies in yarn orientation and what creates the wales. Weft knitting is what most people imagine when they think of hand knitting or typical machine knitting. In weft knitting: Wales run perpendicular to the yarn's course (the yarn travels horizontally, but the vertical columns of loops run up and down) A single yarn can produce an entire fabric—the same yarn continuously creates row after row The yarn moves back and forth across the needles Warp knitting, by contrast, works differently: Wales run parallel to the yarn course (the yarn and the vertical columns move in roughly the same direction) Each wale requires its own separate yarn, so many yarns must work simultaneously Yarns move up and down rather than back and forth For this study guide, we'll focus primarily on weft knitting, as it's more commonly encountered and is the foundation for hand knitting techniques. Casting On and Binding Off These are the techniques that begin and end your knitted piece. Casting on creates the initial loops on the knitting needle. These foundation stitches give you something to knit into and establish the width of your piece. Different casting-on methods create different edge qualities—some are stretchy, some are tight, and some are decorative. Binding off (also called casting off) secures the final stitches once you've finished knitting. Without binding off, your stitches would unravel. Binding off interlocks the loops so they can't come undone. Fundamental Stitches Knit and Purl Stitches All knitted fabric is built from two basic stitch movements: the knit stitch and the purl stitch. The difference between them lies in which direction the new loop passes through the previous loop. A knit stitch is made when the new loop passes through the previous loop from below. From the front of the fabric, the working yarn comes from behind the needle and pulls through. A purl stitch is made when the new loop passes through the previous loop from above. The working yarn comes from in front of the needle and pulls through. This distinction is crucial because it determines the visual appearance of your fabric. Here's the key principle: a knit stitch viewed from the front looks identical to a purl stitch viewed from the back. This is why the same stitch produces a "V" on one side and a bump on the other. Visual Appearance of Stitches Understanding what your stitches look like is essential for reading patterns and diagnosing problems. Knit stitches appear as small vertical "V" shapes on the fabric. When you look at the front of a knit stitch, you see a clear V-formation created by the loop structure. Purl stitches appear as horizontal wavy lines or bumps on the fabric. They look like little nubs stacked on top of each other, creating a textured appearance. The key takeaway: if you see V-shapes, you're looking at the knit side. If you see bumps, you're looking at where the purl stitches face outward. Common Stitch Patterns Garter Stitch Garter stitch is one of the simplest and most forgiving patterns to knit. It's created by knitting every single row (or, equivalently, purling every single row if you knit from the other side). Since every row is identical, garter stitch has a unique appearance: vertical ridges that create a textured, blocky fabric. Importantly, garter stitch lies completely flat and has very little curl at the edges—this makes it ideal for items like blankets and scarves where edge curling would be problematic. Garter stitch also provides significant vertical stretch, making it useful when you need give in the vertical direction. However, because the fabric is bumpy throughout (every row produces those characteristic ridges), it's thicker and bulkier than other basic stitches. Stockinette Stitch Stockinette stitch is the most common stitch in knitting and the one you'll encounter most frequently. It's created by alternating rows of knit and purl stitches: Knit one row Purl one row Repeat This creates the smooth, V-shaped texture on the front that most people associate with knitted fabric. Right Side and Wrong Side Stockinette has a right side (the side you're meant to see) and a wrong side (the back). The right side displays the characteristic V-shapes of knit stitches—smooth and neat. The wrong side shows what all those purl stitches look like when you view them from behind: bumpy, horizontal rows that look quite different from the front. This textured back side is sometimes called "reverse stockinette" when used intentionally as a design element. The Curl Problem Stockinette fabric has a notable tendency to curl at its edges. Here's why: because knit stitches pull inward slightly compared to purl stitches, the stockinette fabric naturally wants to curl: Top and bottom edges curl toward the front (toward the knit side) Side edges curl toward the back (away from the front) This curling is why stockinette isn't used for edges—instead, knitters use garter stitch, ribbing, or other flat-lying stitches for borders. Ribbing Ribbing is created by alternating vertical columns of knit and purl stitches. The most common form is 2×2 ribbing: two vertical columns of knit stitches, then two vertical columns of purl stitches, repeating across the row. Ribbing looks bumpy but organized, with clear vertical lines running up the fabric. The key property that makes ribbing so useful is that it provides strong horizontal stretch—the fabric can compress significantly side-to-side, which makes it ideal for cuffs and waistbands. When you see a sweater sleeve cuff that grips your wrist, that's ribbing holding it in place. The fabric can stretch out to pull on but bounces back to its original width. Seed Stitch and Moss Stitch Seed stitch (also called moss stitch in some traditions) is created by alternating knit and purl stitches in a checkerboard pattern—alternating every stitch in every row. The result is a dense, textured fabric with a pebbly appearance. Importantly, seed stitch lies flat like garter stitch, because the alternating knit and purl stitches balance each other out, preventing curl. The fabric has relatively equal stretch in all directions and a subtle, sophisticated texture. Physical Properties of Knitted Fabrics Superior Elasticity in Multiple Directions One of the most distinctive properties of knitted fabric is its exceptional stretchiness. Because yarn loops form an interlocking chain rather than crossing over each other (as in woven fabric), knitted fabric can stretch in nearly every direction. While woven fabrics mainly stretch along the diagonal (the bias), knitted fabrics can stretch up to 500 percent in both horizontal and vertical directions. This is why knitted sweaters conform to your body, why socks stay up, and why knitted garments feel more flexible than woven ones. This property is fundamental to the design of knitted garments—the fabric naturally accommodates movement and body contours. How Stitch Choice Affects Stretch Different stitches provide different amounts of stretch in different directions: Garter stitch provides greater vertical stretch and is relatively stable horizontally Ribbing provides greater horizontal stretch and is useful where you need the fabric to grip and recover Stockinette stretches more horizontally than vertically Seed stitch stretches relatively equally in all directions Understanding these properties helps you choose the right stitch for what you're making. If you're designing a fitted sleeve, you might use ribbing at the cuff for grip, but stockinette for the main body where you need some vertical stretch to accommodate arm movement. Yarn Weight and Visual Impact The thickness of the yarn used dramatically affects the final fabric: Thicker yarns produce bulkier fabrics where stitch definition is bold and obvious. A colorwork pattern knitted with thick yarn has very visible, blocky color changes. Thinner yarns create finer, more delicate textures where stitch patterns and color details are more subtle and refined. Intricate color patterns become possible with thin yarn because you can have many more stitches across the same width. This is an important practical consideration: the yarn weight you choose changes not just how quickly you knit, but also the visual impact of your pattern. Colorwork and Pattern Variations <extrainfo> Weft-Knit Fabrics with Color While knitted fabric can be made from a single yarn, it can also incorporate multiple colors. Weft-knit fabrics support two primary colorwork techniques: Intarsia involves using separate balls of yarn for different colored sections. Imagine knitting a sweater with a picture in the middle—you'd use red yarn for the red parts, blue yarn for the blue parts, and so on, switching between yarns as needed. The different colored yarns are twisted together at color changes to avoid holes. Stranded colorwork (also called Fair Isle) uses two colors of yarn at a time, carrying the unused color inside the fabric as you knit. This creates a slightly thicker, warmer fabric but limits you to two colors per row. Both techniques allow for beautiful, complex patterns in knitted fabric while maintaining the structural properties of the knit itself. </extrainfo> Key Takeaways: Knitted fabric is built from interlocking loops that can stretch in multiple directions. The two fundamental stitches—knit and purl—can be combined in various patterns to create different textures and properties. Garter stitch and ribbing lie flat and are useful for edges, stockinette is versatile but curls, and seed stitch offers balanced properties. The yarn weight you choose affects both the visual appearance and the practical feel of your finished fabric.