This page teaches a merchandiser, planner or pattern engineer how a single fabric consumption figure, such as Order A's own 0.205 kg per piece, is actually built from a marker and a size set, not treated as a number someone else already worked out. It is for anyone who has used a fixed consumption figure without knowing where it came from, and it builds on Course 3's fabric calculator, though that earlier lesson is not required. This mainly teaches the money flow of an order: a wrong consumption figure changes how much fabric a mill invoices and how much a factory quotes.
Course 3 already showed that Order A's fabric consumption is fixed at 0.205 kg per piece, including 7% marker wastage, and multiplied by the order quantity for the total requirement. That earlier lesson treated 0.205 kg as a finished figure. This lesson opens that figure up: how a pattern engineer arrives at 0.205 kg in the first place, from the garment's own pattern pieces laid on a marker for a whole size set. Without this skill, a planner can check a figure's arithmetic but not tell whether it was ever built correctly, and cannot rebuild one for a new style.
You need: no previous lesson from this course. Course 3's fabric calculator (T03-C03-L01) is helpful background on turning a per-piece figure into an order total, but it is not required here.
By the end of this lesson you can:
Not covered here: turning a per-piece figure into an order total (T03-C03-L01, already covered), how the wastage percentage itself is checked and defended against a mill (Lesson 2 of this course), the cost of the fabric once the consumption figure is fixed (Lesson 3 of this course).
| Term | Meaning |
|---|---|
| Fabric consumption | The amount of fabric, by weight or length, one garment piece uses; the basis for calculating an order's total fabric requirement. |
| Marker | The layout of all pattern pieces for a size, or a set of sizes, arranged on fabric width, used to cut fabric with the least possible waste. |
| Marker layout | The cutting layout that arranges a garment's pattern pieces on a length of fabric before cutting; it must fit inside the fabric's usable width, not its full width. |
| Marker wastage | Fabric lost during cutting because pattern pieces never fill a cutting layout perfectly; a separate allowance from combing waste. |
| Marker efficiency | The percentage of fabric in a marker actually used for pattern pieces, the standard-industry complement of marker wastage. |
| Multi-size marker (ratio marker) | A marker containing pattern pieces for several sizes together, laid out in the order's own size ratio. |
| GSM | Grams per square metre: the standard way fabric weight is stated. |
A pattern engineer does not choose a consumption figure directly. The figure is built up from the garment's own pattern pieces, each with its own fabric weight once laid on a marker, added together, then increased by the marker's own wastage percentage to cover the fabric that a cutting layout can never fully use. Order A's own fixed figure of 0.205 kg per piece is exactly this kind of built-up total: 153 g for the body pieces, 39 g for the sleeve pieces, and 13 g of marker wastage, adding to 205 g. The neck rib, about 8 g, is a separate trim fabric and is never folded into the 0.205 kg body-and-sleeve figure.
| What can differ | The shapes you meet | Why it matters |
|---|---|---|
| Number of sizes in one marker | Order A's own size run, S M L XL in the ratio 1:2:2:1, cut together on one marker | Consumption per piece is the marker's total fabric divided by the total pieces in that one marker, not any single size's own weight. |
| Knit or woven construction | A knit T-shirt's body and sleeve pieces (Order A); a woven jeans leg, waistband and pocket pieces (Order B) | The pieces differ in shape and count, but the same build-up method, pieces plus wastage, applies to both. |
| Export or domestic order | Delta Garments builds Order A's marker for an export FOB order; Cedar & Co.'s own domestic T-shirts use the same build-up method against its own pattern | The method does not change with the buyer; only the pattern pieces and the fabric price change. |
| Trim fabric kept separate | Order A's neck rib, about 8 g, cut from ribbed fabric rather than the body fabric | A trim fabric on a different roll, such as a rib, is never added into the main body-and-sleeve consumption figure; it is its own line. |
| Related product families | Socks and hosiery (a marker for the leg and foot panels, weight-based like a knit); terry towels and home-textile bedding (a marker for panels cut from a wide roll, often length-based) | The same pieces-plus-wastage build-up reappears outside apparel, following the same marker logic on a different shape. |
Delta Garments makes Order A, Northline Apparel's basic cotton T-shirt, in four sizes, S, M, L and XL, cut in the fixed ratio 1:2:2:1 across every marker the cutting room lays. Before the fabric consumption figure reaches any spec line or purchase order, Delta Garments' pattern engineer first lays every pattern piece for one full set of that ratio onto a marker of Order A's own 180 GSM single jersey fabric, at the fabric's usable width.
The pattern engineer cannot skip straight to a single number. A marker built only from the size M pieces would understate a larger size's own fabric need and overstate a smaller size's, so the figure that ends up on Order A's spec line is worked out from the multi-size marker as a whole, then expressed as an average weight per piece across the ratio it was cut in. This is the step that turns a set of pattern pieces into the single 0.205 kg figure Course 3 already used.
The worked numberOrder A's own fixed pattern weights, added first without wastage:
Marker wastage is then added to reach the fixed 205 g total:
The 13 g of wastage is not an arbitrary top-up; it is what is left over on the marker once the 192 g of usable pattern pieces are cut out, checked against the marker's own efficiency:
A common mistake is weighing only the size M pattern pieces and writing that single size's own weight onto the spec line as if it applied to the whole order. A multi-size marker cuts S, M, L and XL together in a fixed ratio, so the marker's total fabric, divided by the total pieces it produces, is not the same number as any one size's own weight; a size step of about 4% in weight means L and XL pieces use noticeably more fabric than S and M. A planner who copies one size's own figure onto the spec line either understates the order's real fabric need, if the sample size chosen was smaller than the ratio's average, or overstates it, if the sample size chosen was larger.
This mistake is easy to make because a sample garment is nearly always cut and checked in one size, usually a middle size such as M, so a weight taken from that one sample feels like the finished answer. The safeguard is to remember that the fixed 0.205 kg on Order A's own spec line is already the multi-size marker's own average across its full 1:2:2:1 ratio, not the middle size's own weight copied across, and to rebuild it from the ratio whenever a new style's consumption figure is first calculated.
A garment's fabric figure is not a number someone simply decides on. It comes from laying out every piece of the pattern, for every size cut together, onto the fabric, then adding up how much fabric those pieces use. Some fabric is always left over because the pieces never fit together perfectly, and that leftover amount is added on top as wastage. A trim, like the neck rib on a T-shirt, is worked out on its own and never mixed into the main fabric figure. Because sizes are usually cut together in a group, not one at a time, the final per-piece figure is an average across the whole group, not the weight of any single size on its own.
Delta Garments' merchandiser, Mona, needs Order A's fabric consumption figure today so she can release the fabric purchase order to Rowad Knits. Karim, the production manager, tells her the size M sample already came back from the cutting room at 205 g of body and sleeve fabric, and suggests using that figure directly.
Should Mona release the fabric purchase order using the size M sample's own 205 g figure? Decide before opening the answer.
Yes, but only because it happens to match here, not because a single size's own weight is the correct method. Two facts decide this.
First, Order A's fixed multi-size marker's average, 0.205 kg, was already built from the full 1:2:2:1 ratio, not from size M alone. The cutting room's size M sample weight of 205 g happens to be close to the multi-size marker's average because M sits near the middle of the ratio and the weight range across sizes is narrow, about 4% per size step.
Second, if the sample size had been S or XL instead of M, its own weight would sit noticeably below or above the multi-size marker's average, and using it directly would misstate the order's real fabric need. Mona should confirm the figure against the multi-size marker's own average, as the spec line already states, rather than trust a single sample size's weight simply because it is the one in hand.
Using a single sample size's own weight instead of the multi-size marker's average carries a real cost once the size ratio is uneven. On Order A's 15,000 pieces, cut in the ratio 1:2:2:1, a planner who mistakenly used the smallest size's own lighter weight instead of the 0.205 kg multi-size marker's average would under-order fabric against the larger sizes' real need, and Rowad Knits would need to supply a second, urgent top-up batch, which typically carries a rush charge on top of the normal fabric price. The reverse mistake, using the largest size's own heavier weight, over-orders fabric across all 15,000 pieces, tying up cash in fabric Delta Garments never needed, exactly the kind of avoidable waste this lesson's build-up method prevents by starting from the whole multi-size marker rather than one size's own sample.
The Material cost sheet (this course's workbook) holds a row for building up a garment's fabric consumption from its own pattern pieces and marker wastage, exactly as worked through in this lesson.
| Question | Order A (filled in) | Your order |
|---|---|---|
| Body and sleeve pieces (pieces-only subtotal) | 192 g | |
| Marker wastage | 13 g | |
| Fabric consumption per piece (formula) | 205 g / 0.205 kg | |
| Marker efficiency (formula) | 93.66% | |
| Trim fabric kept separate (for example, neck rib) | About 8 g |
Download the Material cost sheet from the course page and fill in your own order's pattern-piece weights and marker wastage in the second column.
1. What is Order A's fabric consumption per piece built from?
2. Why is Order A's fabric consumption figure worked out from a multi-size marker rather than from one size's own sample weight?
3. A different style's marker lays 240 g of pattern pieces and shows 96% marker efficiency. What is that style's fabric consumption per piece?
| EN | AR | FR | TR | Meaning |
|---|---|---|---|---|
| Fabric consumption | استهلاك القماش | Consommation de tissu | Kumaş tüketimi | The amount of fabric, by weight or length, one garment piece uses; the basis for calculating an order's total fabric requirement. |
| Marker | الماركر | Placement | Pastal | The layout of all pattern pieces for a size, or a set of sizes, arranged on fabric width, used to cut fabric with the least possible waste. |
| Marker layout | تخطيط الماركر | Plan de placement (marker) | Marker düzeni | The cutting layout that arranges a garment's pattern pieces on a length of fabric before cutting; it must fit inside the fabric's usable width, not its full width. |
| Marker wastage | فاقد الماركر | Perte de placement (marker) | Marker firesi | Fabric lost during cutting because pattern pieces never fill a cutting layout perfectly; a separate allowance from combing waste. |
| Marker efficiency | كفاءة الماركر | Efficacité du placement | Pastal verimliliği | The percentage of fabric in a marker actually used for pattern pieces, the standard-industry complement of marker wastage. |
| Multi-size marker (ratio marker) | ماركر متعدد المقاسات (بنسبة) | Placement multi-tailles (au ratio) | Çok bedenli pastal (oranlı) | A marker containing pattern pieces for several sizes together, laid out in the order's own size ratio. |
| GSM | GSM | GSM | GSM | Grams per square metre: the standard way fabric weight is stated. |
You can now build a fixed fabric consumption figure from a marker's own pattern pieces. The next lesson looks closely at the wastage part of that figure: how it is calculated from the same marker, why it is never zero, and what happens to a costing sheet that assumes it is. Back to the course map