Rib knit is a knitted fabric patterned with raised vertical ribs, formed by alternating knit and purl stitches in columns. The structure pulls in across the width, giving rib knit its defining property: powerful crosswise stretch and recovery. It is the fabric of T-shirt neckbands, sweater cuffs, waistbands, and close-fitting ribbed tops that expand over the body and spring back.
How Rib Knit Is Made
Ribbing is knitted on machines with two sets of needles, working knit stitches on one bed and purl stitches on the other in a set pattern. The pattern is written as a ratio: 1x1 rib alternates one knit column with one purl column for a fine, narrow rib; 2x2 rib uses pairs of columns for a bolder, chunkier texture; wider fashion ribs (such as 4x2 or ottoman-style ribs) vary the spacing for design effect.
Because the purl columns recede and the knit columns stand forward, relaxed rib knit is much narrower than its stretched width — a ribbed top can stretch to nearly double across the body. Fibres range from pure cotton to wool, acrylic, and elastane blends that sharpen the recovery.
Where Rib Knit Is Used
- Neckbands, cuffs, and waistbands — sold as ribbing by the piece or tube, matched to jersey garments.
- Fitted tops and dresses — full rib-knit garments that follow the body without darts or closures.
- Socks and sweaters — ribbed cuffs and hems that grip gently and keep their shape.
- Underwear and basics — the classic ribbed vest (tank) is a fine 1x1 rib.
Care of Rib Knit
Wash cool and gentle, and dry flat or on low heat: rib knit can stretch out under its own wet weight if hung dripping, and high heat damages elastane in stretch ribs. Fold ribbed sweaters rather than hanging them. A rib that has relaxed with wear usually recovers after washing as the stitches re-settle.
See the jersey fabric guide for knit weights, stretch, and sewing guidance across the knit family.
FAQs
- What does 1x1 and 2x2 rib mean?
- The numbers count the columns: 1x1 alternates one knit column and one purl column; 2x2 works two of each. Higher first numbers give wider, bolder ribs.
- Why do ribbed tops stretch so much sideways?
- The rib structure is a built-in accordion across the width. Lengthwise it behaves more like ordinary jersey.
- Is rib knit only used for trims?
- No. Trims use ribbing, but whole garments — fitted tops, dresses, skirts — are made from wider rib knit yardage.
Detailed Guides: see Rib Knit in the glossary A–Z listing of the Apparel Search fashion glossary for related terms.