Yarn Counts in Tweed: What 2/8 NM Means for Hand, Weight and Cost

Ask three suppliers to quote “a 400 gsm tweed for overcoats” and you will often get three different cloths. The missing variable is usually the yarn: its count, its ply and how those numbers translate into hand, weight and cost per meter. Yarn count notation looks like code (2/8 NM, 2/16 NM, Nm 1/6), but the logic underneath is simple, and buyers who read it can compare quotes from different mills in minutes instead of trusting adjectives like “fine” or “heavy”.

We spin and twist most of the yarn used on our 300-plus looms in Wenzhou, so count selection happens at the quoting stage rather than at weaving. This guide explains the metric (NM) system, why tweed is almost always plied, how count interacts with finished weight, and where the cost sits. For a broader view of how worsted and woolen systems differ, our woolen overcoat program page shows the two yarn routes side by side in current production.

The NM system in one paragraph

Metric count (NM) describes how many meters of yarn one kilogram of fiber produces. A 1/8 NM single yarn therefore has 8,000 meters per kilogram; the higher the first denominator relative to the ply, the finer the yarn. The notation reads ply/count in UK convention (2/8 = two-fold 8s) and count/ply elsewhere, which is why buyers should always confirm the convention with the mill before comparing numbers. Wool’s own industry body explains the fiber-to-yarn pathway in its wool fibre overview, and the practical takeaway is consistent: the count system is a length-per-mass measure, so weight claims on a spec sheet can be checked by arithmetic once the count and construction are known.

For tweed specifically, 2/8 NM is the workhorse: a two-fold yarn with enough body to give the cloth its characteristic dry, slightly hairy surface. Finer 2/16 to 2/24 NM yarns appear in lighter jacketing tweeds where drape matters more than storm-proof hand. On the other end, 1/6 or 2/4 NM singles go into heavy outdoor and upholstery-adjacent cloths, where the thick yarn is the point.

Why tweed yarns are plied

Plying twists two single yarns together, and the twist does three jobs. It balances torque, so the woven cloth stays flat instead of skewing. It increases abrasion life, which is why a plied yarn survives the rubbing tests behind the ISO grade 3-4 pilling ratings our tweeds carry. And it changes light behavior: two-fold yarns diffuse light across the twist, producing the soft, non-glossy surface that defines the tweed look. A single yarn of the same count costs less and weaves faster, but it pills earlier and reads shinier, which is why we do not quote single-yarn tweed for programs that must survive daily wear.

How count drives price and lead time

Two cost mechanisms matter to buyers. First, spinning time: finer counts spin slower, so 2/16 yarn costs more per kilogram than 2/8 at the same fiber quality, and the premium is typically 8 to 15 percent across neighboring count steps. Second, dye batching: custom-colored yarns are dyed in lots keyed to the count and ply, so changing count mid-program re-opens the dye question; our Pantone matching workflow treats count as a fixed input for exactly this reason. Lead time follows the same logic, since the weaving plan is scheduled around yarn availability rather than loom hours alone, a dependency described stage by stage in our lead time guide.

The practical comparison method for buyers: normalize quotes by finished weight and construction (woven tweed vs knit), then ask each mill to state yarn count, ply and fiber blend on the quote. A quote that cannot state its count is either reselling or guessing, and both cost you control over reorders. The same discipline applies when judging substitute proposals from a second mill, as covered in our second-source qualification guide.

Quick checks on delivered cloth

Three checks catch most count-related surprises without lab equipment. Weight: cut a 10 x 10 cm square, weigh it in grams, multiply by 100 for gsm; tolerance against spec should sit within about 5 percent. Twist direction: untwist a short yarn segment and note whether both plies and singles turn the same way (balanced twist holds better in the loom). Evenness: pull a meter of yarn slowly past a fixed point and watch for thick places, which predict barre defects in the finished cloth. Reorder programs lock these checks against the golden sample, so the cloth in month eighteen still matches the cloth in month one.

Sampling on count-specified constructions runs on our 7-day pre-production flow, custom colors and constructions quote from 300 meters, and stock-supported counts ship from the 100,000-meter floor without MOQ. Inquiries reach the sales desk within one working day.

Video: yarn to cloth craftsmanship

The clip follows yarn through twist and weaving into finished tweed, showing where the count decisions made at spinning shape the surface you evaluate at approval.

Frequently asked questions

See also our what drives knit fabric price per meter.