Most of the inspection advice on this site comes down to looking at seams. On a knit there are barely any seams to look at. A sweater is not cut out of cloth and joined; it is manufactured as the garment, loop by loop, on a machine set to a gauge, and what goes wrong with it goes wrong in the structure rather than at the joins.
That difference reorders every check. Stitch density on a side seam tells you almost nothing about a cable knit. Gauge, ply, fibre and finishing tell you everything, and only one of those four is visible in a photograph.
Gauge is the number nobody publishes
Gauge is how fine the knitting machine is — how many needles per inch — and it decides what the garment is. A coarse gauge gives the chunky, open-structured sweater that reads as winter; a fine gauge gives something closer to a jersey. The same pattern at two gauges is two unrelated products.
No seller in our data publishes a gauge figure, and none of the 57 size charts we hold has a field for it. You can read it out of a photograph instead — the one knitwear property images carry well. Count the visible loops across a known distance, or compare loop size against the ribbing at the cuff. If the picture is too compressed to see individual loops, ask for a closer shot: resolution destroys knit structure first.
Ply, and why two sweaters at the same weight feel different
Ply is how many strands are twisted into the yarn. A two-ply at a given weight is rounder, more stable and better at resisting abrasion than a single of the same thickness. Cheap knitwear reaches its target weight with a soft, loosely spun single, which is how a garment hits a respectable gram figure and still sheds within a fortnight.
No seller will give you a ply figure. A weight on a scale and a close photograph of the yarn will still separate a dense fine-gauge knit from a bulked-out loose one — fabric weight and drape covers using a gram figure comparatively rather than as a threshold.
Fibre claims, and how little the record supports them
Four of the 237 quoted comments we hold mention knitwear. One is a buyer arguing about what a seller does and does not stock, and it turns on fibre:
Both Liz and KK offer cheap reps which are decent for the price and are an alternative for RK since he sources from them, but they do not sell high quality reps like this. They especially do not sell WOOL cable knit quarter zip, which this is...
u/probotzor, r/stockholmreps, 16 December 2025
That is a claim about a market, not a measurement, and we have not verified it. It is quoted for what it shows about the terms people argue in: the word carrying the argument is a fibre name, capitalised, and nobody in the thread produced a way of checking it.
The seller-side evidence is thinner. Of the 57 size charts we extracted, eleven state a composition and exactly one says wool — a line reading 100% wool, printed immediately after a boilerplate sentence about rinsing jeans in cold water. That is the whole documented fibre record for knitwear in our dataset.
So the practical posture is the one in caring for rep clothing: treat composition as unknown and default to the rules for the weakest fibre the garment could plausibly contain.
Where knitwear actually fails
- Fully fashioned versus cut-and-sew. A fully fashioned knit is shaped on the machine, panels knitted to their outline and linked together; a cut-and-sew knit is cut out of knitted yardage and overlocked like woven cloth. The second is cheaper, and it is why some sweaters shed fibre from the seam allowance forever. Look at the shoulder from inside — a linked seam is a fine chain, an overlocked one a bulky ribbon.
- Ribbing recovery. Cuffs, hem and collar are the only parts under repeated tension. Ribbing that does not spring back is the commonest permanent complaint about cheap knitwear, and it is invisible in every photograph ever taken.
- Logo work. Embroidery on a knit has nothing stable to sit on, so it puckers the ground fabric and distorts as the knit moves. One buyer put that on the record about a knitted quarter-zip:
Congrats man. Logos seem really good, it was not the case for me with knitted quarter zip also repkingdom logo seems really off I'll post a qc later once everything arrives in warehouse.
u/grim7900, r/FashionReps, 22 October 2024
One comment is one comment; it sits with the rest on their evidence page and it is not a rating of anybody. Read it for the mechanism: a logo that is fine on a woven piece from the same store can be wrong on a knit, because the substrate differs. Embroidery and print covers the checks.
The pilling problem, and why nobody can answer it for you
Pilling is short fibres working loose under friction and balling on the surface. It happens where the garment rubs — underarms, sides, the strap line of a bag — and it is the most common reason a cheap knit stops getting worn. Three honest statements:
- It is a function of fibre length and spinning, not of price or of how good the seller is. A soft, brushed handle at purchase is often short fibres raised to the surface, and that is the fibre that will pill.
- It is invisible before purchase. No photograph, measurement or QC request predicts it, and a seller who says their knit does not pill is telling you something they cannot know.
- It is manageable rather than terminal. A fabric shaver or a comb, used gently, keeps most knitwear presentable for years.
Our corpus cannot help here, and it is worth saying why. The comments we hold were written at or near the moment of purchase — hauls, QC threads, unboxings. Pilling shows up at month three. A record built out of arrival posts contains no wear data, and its silence is not reassurance.
Before you commit
Ask for the things photographs cannot carry: a weight in grams, a macro of the knit surface, a shot of the inside shoulder seam, and a short video of the garment hanging and moving.
Then size it deliberately. Knits give you whatever measurement you want under tension, and the seller measuring theirs is in the same position — sizing outerwear and knitwear covers that. Use the link decoder for a buy link that resolves, read how to buy reps if this is a first order, and let the QC photos do the deciding.