Men’s T-Shirt Manufacturing in China: Six Specs to Fix Before You Shortlist a Factory

Most T-shirt programmes are compared on price before anyone has agreed what the product is. Six specifications — yarn, weight, knit, fit block, neck treatment and finishing — determine the cost, the hand-feel and whether the range reviews well, and each one can be fixed in writing before a factory is shortlisted. Buyers who do that get comparable quotations; buyers who do not compare six different products and call the difference a price gap.

Which six specifications fix a T-shirt programme?

Yarn, weight, knit, fit block, neck and finishing.

Those six describe the product completely enough that two factories quoting them are quoting the same garment, which is the prerequisite for any meaningful price comparison.

Fix them in writing and send the same brief to every candidate. The replies will differ in price, and now the difference means something: it is labour, efficiency and margin rather than an unspecified fabric or a block nobody measured. Where one specification is still open, mark it as open rather than leaving it to the supplier to fill in, because a factory that chooses the fabric for you is also choosing your hand-feel.

How much does yarn quality matter?

It decides how the shirt feels and how it ages.

Combed and ring-spun yarns remove short fibres and produce a smoother, stronger surface, while carded or open-end yarns cost less and feel coarser.

The difference appears in the hand-feel immediately and in the wash results over time, because short fibres work loose and form pills. For a premium or mid-market programme, specifying a combed or ring-spun yarn is usually the single most effective quality decision available, and it is a specification the customer can feel within seconds of picking up the garment. Ask which yarns the factory runs and what the composition is, then confirm the choice on a washed sample rather than a swatch. Where the budget does not allow a better yarn across the range, applying it to the core plain colourways delivers more visible value than spreading it thinly.

How should the weight be chosen?

By season and by market.

A light knit drapes and suits warm climates and layering, a mid weight is the year-round default, and a heavier knit holds a boxy shape and reads as a streetwear product.

Weight interacts with the fit block more than buyers expect: an oversized silhouette needs enough body to hold its shape, while a fitted block in a heavy fabric can feel restrictive. Ask for the weight in grams per square metre and test a sample in the position it will be worn rather than on a hanger. Where a range includes several fits, keeping the composition identical and varying the weight keeps the fabric purchase consolidated, which simplifies both the mill conversation and the price structure.

How does knit structure change the garment?

It changes the surface, the recovery and how prints behave.

Single jersey is the standard for T-shirts, interlock gives a smoother two-sided surface, and rib is used for necks, cuffs and occasionally for whole garments.

Structure affects decoration as well as feel: a smooth, tightly knit surface takes screen print and DTG predictably, while a slub or textured knit creates a deliberate unevenness that changes how artwork reads. Ask the factory which structures it runs in the fibre you have chosen and which decoration methods it has validated on each. Where a brand wants a distinctive surface, the structure is the specification to change rather than the fibre, because it alters the appearance without forcing a change to the composition or the care instructions.

Which fit block should the range use?

The one that matches the customer’s existing wardrobe.

Classic, relaxed, oversized and boxy blocks differ in shoulder position, chest width, body length and hem shape, and each suits a different market.

The block is the specification buyers most often leave to the factory, and it is the one that generates the most returns when it is wrong. Ask for the measurements of the block on offer — shoulder, chest, body length and hem — and compare them with a shirt the target customer already wears. Where you need a specific silhouette, describe it in measurements rather than adjectives, because “oversized” means different things to different pattern makers. If the range needs two blocks, treat them as two styles sharing a fabric and a neck specification, which limits the additional cost to pattern work and a size set.

Why do the neck and shoulders fail first?

Because they carry the garment’s tension.

The neck rib takes the strain every time the shirt is pulled on, and the shoulder seams carry the weight of the body, so both fail before the rest of the garment shows wear.

Two details matter. The rib needs adequate width and a controlled stretch ratio so it returns to shape, and the shoulder seam benefits from taping or a cover stitch that prevents stretching along the seam line. Ask how the factory controls rib tension and whether the shoulder is taped as standard or as an option. These are in-process checks rather than final-inspection items, because a neck that is attached unevenly cannot be corrected afterwards, and they are the reason two T-shirts of identical fabric can behave very differently after ten washes.

What does finishing change?

The hand-feel, the colour character and the price.

Garment dyeing, washing and softening each alter how the shirt feels and how the colour reads, and each adds a process step with its own minimum and lead time.

Garment dyeing produces a softer, deeper colour than piece dyeing and introduces shrinkage that has to be allowed for in the size chart, while washing and softening improve hand-feel without changing the colour. Ask what finishing the factory applies as standard and what is optional, and ask what each option does to the weight and the measurements, because a garment-dyed shirt will not have the same dimensions as the same block dyed as fabric. Where a brand’s proposition depends on feel, finishing is worth specifying; where it does not, the money is better spent on the yarn.

How does colour count affect the minimum?

More than quantity does, in most programmes.

Each colour is a separate dye lot or a separate decoration setup, so the colour count multiplies the components that create a minimum.

That makes colour consolidation the most effective way to reduce a first-order threshold, more so than trimming the quantity. A range of two colours with a deep size run is usually cheaper to produce and easier to reorder than four colours with thin quantities, and it produces clearer sell-through data. Ask the factory what the minimum is for each colour and how the fabric is scheduled across them. Where the design calls for several shades, launching with fewer and adding the rest on the reorder keeps the first order viable without weakening the range.

What should the sampling sequence prove?

Three gates: the fit, the grading and the line.

A development sample tests the concept, a fit sample tests the block, a size set tests the grading and a pre-production sample tests whether production can reproduce the approved garment.

On T-shirts the size set is the gate buyers skip most often, and it is the one that catches the errors that produce returns across a whole size range. Produce it, measure every size, and record the values in the chart. The pre-production sample then becomes a confirmation rather than a new evaluation, which shortens the approval cycle and leaves the bulk order with a written standard rather than a shared impression. Ask what each sample is charged and whether the cost is credited against bulk, because that answer affects the economics of a first order.

Which quality gates belong in a T-shirt run?

Incoming fabric, in-line checks and a final inspection.

Five checks cover the points where a T-shirt programme most often loses consistency, and each corresponds to a specific defect that shows up in reviews rather than on the line.

• Incoming fabric inspection for weight, shade and hand-feel against the approved standard.
• In-line checks on neck rib tension and shoulder seam finishing.
• Measurement verification across the size set during the run.
• Print and decoration adhesion checks where the shirt carries a mark.
• Final inspection at a stated acceptance level, with defect classes defined.

Agree the plan in writing before production and apply it consistently to every order, so a change in results reflects the product rather than the sampling.

Consistency matters more than severity here. Where the order value justifies the cost, third-party inspection before shipment provides an independent record. Finetex Global’s programmes are documented as raw fabric inspection, in-process checks and a final AQL or full inspection on request, which is the level of specificity to look for in a supplier’s proposal.

Sources: Supima — extra-long staple cotton; OEKO-TEX STANDARD 100; 16 CFR Part 303 textile labelling; ISO 9001 quality management; Textile Exchange standards.