Yarn Count and Knit Fabric Specifications: A Buyer's Glossary

Sourcing knit fabric means reading specifications full of abbreviations: 30s combed cotton, 150 denier, 20GG, 180 gsm, 1x1 rib. Miss the meaning of these terms and you may approve a sample that quietly differs from what you intended — or pay for quality you did not specify.

This glossary explains the knit specification terms that matter most to buyers, in plain language.

Yarn Count: How Fine the Yarn Is

Yarn count describes the thickness (or fineness) of a yarn. It is the single most misunderstood specification and one of the biggest cost and quality drivers.

Cotton count (Ne)

Cotton count, written as Ne or simply “30s”, is the traditional measure for cotton and spun yarns. It works inversely to thickness:

Common apparel counts: 20s for heavier knits, 26s and 30s for standard jersey, 40s for fine, smooth fabric. A 30s jersey is a workhorse; a 40s jersey feels finer and more premium but can be more prone to pilling if not well made.

Denier and dtex

Denier measures filament yarns — typically polyester, nylon and other synthetics. Unlike cotton count, denier works directly:

Dtex is a metric equivalent (10 denier = roughly 11 dtex).

Why it matters to buyers

Yarn count determines hand-feel, weight and cost. For the same fabric weight, a finer yarn costs more per kilogram. If a quote seems low for a “40s premium jersey”, it may in fact be a coarser yarn.

GSM: Fabric Weight

GSM (grams per square metre) is the standard measure of fabric weight and the specification buyers rely on most.

Always specify GSM with a tolerance (typically ± 5%, tighter for premium). GSM without a tolerance is not a specification — it is a hope.

Gauge (GG): Knit Machine Fineness

Gauge refers to the number of needles per inch on a knitting machine, and it controls how fine the resulting fabric or garment is.

Gauge is essential to specify for flat-knit garments, because a 12GG sweater and a 5GG sweater with the same fiber content are entirely different products.

Fabric Structure

Structure describes how the loops are formed — covered in detail elsewhere, but the key terms are:

Specify structure alongside fiber and GSM, because all three interact.

Fiber Composition and Blend Ratio

Composition states the fiber content and percentages. Precision matters:

Specify combed vs. carded cotton too. Combed cotton removes short fibers for a smoother, stronger yarn; carded is cheaper and rougher.

Twist and Yarn Type

Width and Form

Finishing and Treatment Terms

How to Write a Complete Fabric Specification

A complete knit specification includes:

Conclusion

Knit fabric specifications are a language, and buyers who speak it source better. Understand yarn count and its inverse logic, specify GSM with a tolerance, state gauge for flat knits, and describe structure, composition and finish precisely. The gap between a vague brief and a complete specification is exactly the gap between the sample you wanted and the one you receive.

Key Takeaways for Buyers

Work with HONGTEX

HONGTEX is a vertically integrated knit textile manufacturer based in China, offering in-house knitting, dyeing, cutting, and finishing under one roof. From fabric development and sampling to bulk production and third-party quality inspection, we support brands, retailers, and trading companies across every step of the product journey. Contact our team today to discuss your project and receive a tailored quotation within 24 hours.