Yarn Stock and Reorders: Managing the Biggest Risk in Knitwear Supply

By YZR Sweaters · 2026-09

Knitwear reorders rarely fail at the machine. They fail at the yarn store. A style can sell well, the factory can have capacity, and the order can still arrive in a shade that no longer matches the first drop — because the yarn that made it is finished. This is manageable if planned in the first order.

Why is yarn harder to replace than a finished sweater?

Knitting capacity is flexible; a specific yarn is not. Four constraints make the yarn the bottleneck.

• Dyeing runs in batches. Colour is produced in individual dye lots, each carrying its own slight variation. There is no way to dye one sweater's worth of yarn to the last lot's exact shade.
• Spinning and dyeing carry minimums. Yarn mills set minimum order quantities, so a small top-up can be a quantity the mill will not run at all. Our notes on knitwear MOQ explain how these work.
• Stock is shared. A colour or yarn count sitting on a mill's shelf may be committed to another buyer before you ask.
• Seasons tighten supply. When a whole market knits for the same delivery window, popular yarns go on allocation.

Colour reference and dye lot: what is the difference?

These terms are used interchangeably and they should not be. A colour reference is the shade you want — a Pantone number, a lab dip, a signed hanger. A dye lot (also called a colour lot) is the batch of yarn produced when that colour was dyed, identified by its own lot number. The colour reference stays the same for years; the dye lot changes every time the yarn is dyed. Two sweaters can both be the same navy and still sit a shade apart, because they came from different lots — which is why lot numbers belong on the purchase order, the yarn receipt and the sample you keep.

How much reserve yarn should you hold?

There is no universal figure — the industry works on a percentage of the order, sized to the style and calculated from actual yarn consumption. The inputs that move the number are:

• Yarn consumption per piece, which sets the baseline for anything you hold.
• Knitting loss — waste at the machine, linking and finishing, higher on a complex cable or intarsia than a plain knit.
• Order size, since the same percentage becomes impractical on a very small run.
• Probability of a repeat — a bestseller expected to reorder twice justifies a bigger reserve than a one-off shade.
• Season length, because yarn held for a short drop may never be usable again.

Ask for it in kilograms and in pieces, with the loss rate written out — see our guide to yarn consumption per sweater.

Who pays for reserve yarn, and where is it kept?

Settle this before the yarn is dyed. Common arrangements: the buyer pays for the reserve upfront and owns it; the buyer pays a holding fee while the mill keeps stock; or the supplier commits to a quantity without charging until it is used. In each case confirm:

• Ownership — whose asset is the yarn if the style is cancelled.
• Storage — who holds it, for how long, in a dry and pest-controlled store.
• Refundability — whether unused yarn can be returned, and on what terms.
• Reuse — whether it can be applied to another style in your range.

These belong in the supply contract; see our notes on knitwear supply contracts.

Three reorder scenarios and what to do about each

1. The same dye lot is still available

The best case, and the reason to reserve early. Confirm the quantity on hold, release the repeat against it, and keep a sealed sample to check the shade.

2. The same colour, a new dye lot

Expect a small shade difference and decide in advance how much the market will tolerate. Either accept it, dye the whole quantity onto the new lot, or use it only for a separate style. Mixing lots within one delivery is where visible mismatches come from.

3. The colour has been discontinued

Either re-select a close shade or replace the yarn. For a long-term basic, this is where a permanently held yarn colour earns its cost. Agree replacements on a lab dip and a knit-down sample before bulk.

Practical rules for keeping a reorder supply-safe

• Reserve yarn in the first order, with the quantity and price for the reservation written down.
• Write dye lot retention into the contract — how the lot is held, and priority on repeats.
• Keep a standard colour sample from every bulk lot, labelled and stored sealed.
• Maintain standing yarn for evergreen styles, the ones you sell every season.
• Do not depend on a single yarn supplier for a key colour.

When is reserve yarn worth it, and when is it not?

Reserve yarn pays where a style is likely to sell out and reorder, where the shade is a core colour you will use again, or where a mismatch would be visible to the customer. It usually is not worth it for a short-window fashion colour, a one-off sample order, or a yarn you can replace with a near-identical commercial colour at no risk.

YZR Sweaters is a Dongguan knitwear manufacturer working on OEM/ODM programmes with BSCI, SEDEX and Oeko-Tex certified partner factories, where audits and third-party inspection (SGS, BV) are welcome. In the first order we can assess a reserve yarn plan with you, calculate the loss rate on the actual style, and coordinate dye lot retention with the yarn mill.

Frequently asked questions