Cut and Sew Knitwear: The Cutting Room Explained
Quick answer
In cut-and-sew knitwear the fabric is knitted first and the panels are cut from it, so the cutting room decides how much of the fabric becomes garment and how much becomes waste. Marker efficiency — how tightly the pattern pieces nest on the fabric — is the variable, and it depends on the style, the size ratio, the fabric width and the skill of the marker maker. Typical wastage is significant, and it is a direct cost line the buyer usually never sees itemised.
Buyers comparing a fully fashioned quotation with a cut-and-sew one often find the cut-and-sew price lower and assume it is a cheaper factory. Sometimes it is. Often it is a different set of economics: less shaping labour, but fabric cut away and thrown out. Understanding what happens in the cutting room explains where that trade-off actually lands.
What happens in a knitwear cutting room?
The fabric arrives as a knitted roll or as flat panels, is laid out in layers, and the pattern pieces are cut from it. The sequence is short but each step has a quality consequence.
- Fabric inspection and relaxation. The roll is checked for defects and allowed to relax before cutting, because knitted fabric that is cut while still under tension shrinks into a different shape afterwards.
- Spreading. Layers are laid flat to a set height. The number of plies affects productivity and, on some fabrics, the accuracy of the cut.
- Marker placement. The pattern pieces are arranged on the spread to use as much of the surface as possible. This is where yield is won or lost.
- Cutting. Either by hand, by a straight knife or by a computer-controlled cutter. Knitted fabric is more prone to shifting during cutting than woven, so the method matters.
- Bundling and numbering. Cut pieces are bundled by size and shade lot so that panels from one garment come from the same fabric.
Our notes on fully fashioned and cut-and-sew construction cover the strategic choice between the routes. This article covers what happens once cut-and-sew has been chosen.
What is marker efficiency, and why does it matter?
Marker efficiency is the proportion of the fabric area that ends up in garment panels rather than offcuts. It is expressed as a percentage, and it varies enormously by style.
A simple, boxy sweater with straight panels nests efficiently — the pieces are rectangles and they tile. A shaped style with curved armholes, a set-in sleeve and a fitted waist nests poorly, because curved edges leave irregular gaps between pieces. The difference between a good and a poor marker on a shaped style can be several percentage points of fabric, which on an expensive yarn is real money.
Three factors move efficiency. Style shape: the more curves and the more shaped pieces, the lower the efficiency. Size ratio: a marker is laid for a specific combination of sizes, and a balanced ratio nests better than one dominated by a single size. Our notes on size ratio planning cover why that ratio is a commercial decision anyway. Fabric width: a narrower fabric leaves more unusable margin.
Why is off-grain cutting a quality problem?
Knitted fabric has a grain — the direction of the courses and wales — and pattern pieces must be aligned to it. A panel cut off-grain will not hang straight, and the garment will show skewed seams and a hem that sits unevenly.
The confusion is that this looks identical to spirality, which is a yarn-level fault rather than a cutting one. The distinction matters because the remedies are completely different: spirality needs a different yarn or structure, while off-grain cutting is a cutting-room discipline issue correctable on the next order. Our notes on spirality and garment twist cover how to tell them apart.
The control is straightforward: mark the grain line, align the marker to it, and check the first cut panels against a square before cutting the rest of the spread.
How does the cutting room affect cost?
Three ways, and only one of them is visible in a quotation.
Fabric cost through waste. The largest effect. If marker efficiency is 85 percent, 15 percent of the fabric is bought and thrown away, and that is priced into the unit cost. On a cheap acrylic it is absorbed; on cashmere it is decisive.
Labour. Cutting, bundling and numbering are labour steps that fully fashioned construction largely avoids. Our notes on what drives sweater price place them in the wider cost picture.
Rework. Off-grain panels, mismatched shade lots in a bundle, or panels cut short are rework or scrap. These appear as a quality problem but originate in the cutting room.
There is a fourth, less obvious effect: cutting adds a shrinkage risk. A cut-and-sew garment is made from fabric that has already been knitted, washed and relaxed, but the cut edges can still move, so the finishing route has to be controlled. Our notes on shrinkage cover the mechanism.
What should a buyer ask about the cutting room?
- What marker efficiency is being assumed in the quotation. A supplier who can answer this is costing properly; one who cannot is estimating. Our notes on reading a sweater quotation explain how to interrogate the unit price.
- Whether fabric is relaxed before cutting. Cutting under tension produces panels that change size after finishing.
- How grain alignment is controlled, and whether the first panels are checked before the full spread is cut.
- How shade lots are bundled, so a single garment does not contain panels from different lots. Our notes on colour consistency cover the lot control.
- What the fabric consumption per garment is, stated on the bill of materials rather than left implicit. Our notes on yarn consumption explain how the figure is derived.
- Whether the style would knit more efficiently fully fashioned. A shaped style that wastes a lot of fabric may be cheaper to knit to shape, even at higher assembly cost.
When does fully fashioned beat cut and sew?
The comparison turns on two variables: how much fabric the cutting room wastes, and how much shaping labour the style needs.
A simple boxy sweater in an inexpensive yarn favours cut and sew, because waste is cheap and the panels tile well. A deeply shaped style in an expensive yarn favours fully fashioned, because the fabric saved outweighs the additional linking cost. The crossover sits somewhere in between, and it is style-specific.
The practical approach is to ask for both quotations on any style where the answer is not obvious, and to ask what consumption each assumes. A cut-and-sew quote that looks cheaper per piece may be assuming an optimistic marker efficiency that the actual style will not achieve.
At YZR Sweaters we work with partner factories holding BSCI, SEDEX and Oeko-Tex certifications, welcome factory audits, and support third-party inspection through firms such as SGS and BV. On construction we quote the style both ways where the choice is genuinely open and show the consumption behind each, because the cutting room is where a cut-and-sew programme either makes its cost saving or quietly loses it.
Deciding between cut and sew and fully fashioned for a style? Send us the design and quantities and we will come back with both routes and the consumption behind each.
Get a free quote Browse our knitwear rangeFrequently asked questions
What is marker efficiency in knitwear?
It is the percentage of fabric area that ends up in garment panels rather than offcuts when the pattern pieces are laid out for cutting. A boxy style with straight panels nests efficiently; a shaped style with curved armholes nests poorly. The difference is several percentage points of fabric, which matters most on expensive yarns.
Why does my cut and sew sweater have a twisted seam?
It could be either of two faults. If the panel was cut off-grain, the cutting room is responsible and the fix is a cutting discipline on the next order. If a washed panel spirals even when cut correctly, the cause is yarn twist or knit structure, which needs a different yarn or a more stable structure. The two look alike but have completely different remedies.
Is fully fashioned always more expensive than cut and sew?
No, although it usually is on a simple style in a cheap yarn. On a deeply shaped style in an expensive yarn, fully fashioned can be cheaper overall because it wastes far less fabric, and the saved yarn outweighs the higher assembly cost. The crossover depends on the style's shape and the fibre price, so both quotations should be compared on their assumed consumption.