Knitwear Gauge and Yarn Count Explained: GG, Nm, Ne and What 2/28 Means

A knitwear spec sheet is written in shorthand, and the shorthand is where orders go wrong. A buyer approves a sample, the bulk arrives, and the hand-feel is different — because "12GG" on the tech pack was interpreted as a request the mill could not meet with the yarn that had been specified. Understanding four numbers — gauge, yarn count, ply and weight — removes most of that ambiguity.

Gauge: The Machine Number, Not the Fabric Number

Gauge describes the knitting machine, not the finished garment. It is the number of needles per inch of needle bed width. A 12-gauge machine has roughly twelve needles per inch; a 5-gauge machine has roughly five.

The practical consequence is easy to picture: more needles per inch means a finer yarn and a denser, smoother surface. Fewer needles means a coarser yarn and a chunkier, more open hand-feel. Gauge is often written as GG, so 12GG and 12-gauge mean the same thing.

Commercial flat-bed machines are typically offered in a defined set of gauges rather than a continuous range. Manufacturers such as Shima Seiki list options including 5, 7, 8, 10, 12, 13, 14, 15, 16, 18 and 22 gauge across their machine range. In practice, buyers and mills group these into broad bands:

One caution: the mapping between gauge, yarn count and garment weight is mill practice rather than a published standard. There is no standards body that defines "12GG equals a 320 GSM sweater." When a supplier claims a specific gauge-to-weight relationship, the right move is to ask for the resulting fabric weight in grams per square metre and to confirm it on a knitted swatch.

Yarn Count: Nm, Ne, Tex and Decitex

Yarn count expresses how thick a yarn is, and there are two competing logics for doing so.

Indirect systems describe how much length you get per unit of weight, so a higher number means a finer yarn. Nm, the metric count, is the number of metres of yarn in one gram. A 28 Nm yarn yields 28 metres per gram. Ne, the English count, follows the same length-per-weight logic but is defined against a different base length from Nm — and the base differs again between cotton and worsted numbering — so the numbers are not interchangeable between systems.

Direct systems describe weight per unit length, so a higher number means a thicker yarn. Tex is grams per 1,000 metres; decitex (dtex) is grams per 10,000 metres. Textile linear density in the tex system is standardised under ISO 1144, and yarn linear density measured by the skein method is covered by ISO 2060. If you need to convert between numbering systems, use published conversion tables such as ASTM D2260 rather than doing the arithmetic from memory — the base lengths differ between fibre types and it is easy to be off by a large factor.

The two logics are easy to keep straight in a table:

Mills quote in whichever system their local trade uses, which is why the same sweater can arrive described as 2/28 Nm by one supplier and something entirely different by another. Ask for the count in your own system as well as theirs.

Reading "2/28"

The slash notation tells you two things: how many strands are plied together, and the count of each single strand.

2/28 means a two-ply yarn made from 28 Nm singles. Two strands of a 28 Nm single are twisted together to make the working yarn. Three-ply would be written 3/xx.

Why ply matters for a sweater: plying evens out the yarn. Two finer singles plied together produce a more uniform, stronger and more consistent yarn than a single strand of equivalent final thickness, and the plied yarn pills less because the fibres are better locked in. This is one of the reasons two sweaters of the same weight can behave very differently.

Weight: The Number Buyers Actually Feel

Fabric weight, usually given as GSM (grams per square metre), is the most useful single indicator of how a sweater will feel and where it belongs in a range. Two sweaters at the same gauge can still differ in weight because of yarn count, stitch density and the amount of structure in the knit.

Weight is also the number that travels through the whole commercial chain: it drives yarn consumption, cost, freight volume and the warmth claim in your marketing. Specify GSM on the tech pack and require it to be confirmed on the production swatch.

Moisture Regain: The Hidden Variable in Yarn Pricing

Natural fibres absorb moisture from the air, and the amount they hold changes with humidity. Because yarn is bought and sold by weight, the industry works to an agreed commercial moisture regain for each fibre so that a kilogram means the same thing in a humid month as a dry one.

Wool's official commercial moisture regain values are set out in tables such as ASTM D1909, and wool is commonly quoted at roughly 16-17%. The figure is agreed trade convention rather than a physical constant, which is why you see slightly different numbers quoted in different documents.

The practical reason buyers should know this: yarn weight is measured under controlled conditions. Testing atmospheres for conditioning and testing textiles are standardised under ISO 139. If your factory reports yarn consumption and your supplier reports yarn sales in weights measured under different conditions, the difference is moisture, not waste, and it is worth having the conversation at quoting stage rather than at reconciliation.

What Drives Yarn Consumption

Yarn consumption per garment is what converts your design into a material cost, and it is calculated, not guessed. Mills estimate it from a knitted swatch plus a wastage allowance, and the result depends on:

• Panel dimensions, including collar, cuffs and any rib trims
• Gauge and stitch density, which set how much yarn covers a given area
• Yarn count, since a finer yarn covers more area per gram
• Stitch structure — plain knit, rib, cable, jacquard and intarsia all consume differently, and floats in jacquard add consumption
• Finishing losses, from washing, milling and brushing
• Wastage, covering trial pieces, knitting faults and repairs

There is no standardised formula for this. The defensible way to control it is to specify the swatch, approve the consumption figure in the quotation, and then verify the bulk garment weight against the approved sample — because a weight check on a finished garment is a much better control than a theoretical calculation.

FAQ

What does 12GG mean on a knitwear spec sheet?

12GG means the garment is knitted on a 12-gauge machine, which has approximately twelve needles per inch of needle bed. It indicates a medium-gauge knit — typically the mainstay of autumn and winter programmes — and implies a medium yarn count rather than a thick or a fine one.

What does 2/28 mean in yarn count?

It means a two-ply yarn made from two strands of 28 Nm single yarn twisted together. Nm is the metric count, defined as the number of metres of yarn per gram, so each single strand yields 28 metres per gram before plying.

Is yarn count Nm the same as Ne?

No. Nm (metric count) and Ne (English count) are both indirect systems, so a higher number means a finer yarn in both, but they use different base lengths. A given yarn has a different number in each system, so the two figures cannot be substituted without conversion.

Why do two sweaters at the same gauge feel different?

Because gauge describes the machine, not the fabric. Yarn count, ply, stitch structure, fabric weight in GSM and the finishing process all change how a garment feels and wears, even when both are knitted on machines of the same gauge.

Sources

• ISO 1144, Textiles — Universal system for designating linear density (Tex System)
• ISO 2060, Textiles — Yarn from packages — Determination of linear density by the skein method
• ASTM D2260, Standard Tables of Conversion Factors and Equivalent Yarn Numbers Measured in Various Numbering Systems
• ASTM D1909, Standard Tables of Commercial Moisture Regains and Commercial Allowances for Textile Fibers
• ISO 139, Textiles — Standard atmospheres for conditioning and testing
• Flat-bed knitting machine gauge specifications published by machine manufacturers including Shima Seiki

The Bottom Line

Gauge tells you the machine, yarn count tells you the yarn, ply tells you how the yarn was built, and GSM tells you what the customer will feel. Specify all four, ask for the fabric weight to be confirmed on a production swatch, and treat any gauge-to-weight conversion your supplier offers as mill practice to be verified rather than a standard to be trusted. Buyers who can read these four numbers stop approving samples and receiving something else.

LINFAIR knits in-house in Dalang, Dongguan across coarse, medium and fine gauges, quotes yarn consumption against a knitted swatch, and confirms fabric weight on the production sample before bulk. Send us your specification and we will tell you which gauge and yarn count your design actually needs.