Cotton Knit Breakdown: Fabric Weight, Combing, and Structure

September 25 2026 , by Maison Grozavu , 2 min reading time

An educational technical breakdown of cotton fabric weight, ring-spun fiber combing, and structural garment construction.

Cotton jersey knitted at 237 g/m² provides a structural weight distinct from standard lightweight T-shirt knits. Heavyweight jersey fabrics rely on the gauge of the knitting machine and thread thickness rather than synthetic additives. Understanding how knitted cotton behaves requires evaluating fiber processing, fabric weight measured in grams per square meter (g/m²), and rib construction at stress points.

Fiber Combing and Ring-Spun Processing

Raw cotton contains short fibers, dirt, and impurities that weaken yarn when spun. During the combing process, mechanical fine-toothed metal teeth line up the long cotton fibers while removing short fibers under 15 millimeters. This leaves long-staple fibers that are then ring-spun into uniform yarns. Standard carded cotton retains these short fibers under 15 mm, resulting in a rougher surface texture and higher pilling rates over repeated wash cycles. Combed ring-spun cotton yields a smooth surface that resists surface degradation.

In practice: Turn the garment inside out. Flat, smooth seams last longer than raised ones.

Grams Per Square Meter (g/m²)

Fabric density is calculated by measuring the weight of one square meter of fabric in grams. T-shirt fabrics typically range from 140 g/m² to 250 g/m², while sweatshirt fleece is knitted at 280 g/m² to 350 g/m². A heavy knitted jersey at 237 g/m² maintains structure without stiffening, allowing the fabric to fall away from the body rather than clinging. Garments like the Boxy Tee — 170 g/m² demonstrate how specific fabric weights dictate garment drape and silhouette stability.

In practice: Hold a tee up to a window. If you can read your hand through it, it's under 180 g/m².

Ribbing Construction and Collar Resilience

Collars, cuffs, and hemlines require precise stretch recovery to withstand daily wear. A 1x1 rib knit uses alternating knit and purl stitches to create lateral elasticity across stress areas. When elastane is omitted from the collar rib, the material loses memory quickly after washing. A 2x2 rib pattern or high-density 1x1 rib combined with elastane ensures the collar retains shape without stretching out over time.

In practice: Pull a cuff and let go. If it stays stretched, it's 1x1 without elastane.

Sizing and Flat Measurements

Evaluating garment dimensions accurately requires checking flat measurements across key structural points rather than relying solely on sizing tags. Chest width is measured flat from armpit seam to armpit seam, while shoulder drop determines where the sleeve seam lands relative to the natural shoulder line. Garments constructed with dropped shoulders redistribute fabric weight differently across the upper torso.

In practice: Lay a shirt flat on a hard surface and measure straight across from armpit seam to armpit seam.

In practice: Choose the smaller size for a moderate drape or the larger size for a pronounced dropped-shoulder fit.

Grozavu is a Spanish streetwear label, designed in Barcelona, founded by Marius Grozavu. All garments are made to order under the brand's own label in Spain using combed ring-spun cotton and GOTS certified organic cotton fabrics.