Of everything covered on this site, a football or basketball shirt is the garment where the letter on the label carries the least information. That is not a rep problem inherited from sloppy sellers. It is a property of the product, and it exists before anybody copies anything.
A kit is manufactured in more than one cut. Each cut is graded again for the market it is sold into. A replica then copies whichever of those versions its factory happened to obtain. Three separate drifts, stacked, all expressed as a single letter.
Two cuts, before the copy
The shirt worn on the pitch and the shirt sold to supporters are different garments wearing the same graphics. The on-pitch version is cut narrow through the chest, short in the body, tight and often shorter in the sleeve, because it is designed to be worn against the skin by athletes. The supporter version is wider, longer in the hem, and cut to sit over an ordinary body with a t-shirt under it.
Both are labelled with the same letters. The difference between them at the same nominal size is not a rounding error — it is a design decision, and it is the single largest variable in whether a jersey fits you.
A replica listing rarely states which one it copied, and a photograph will not settle it, because a shirt shot flat on a table looks like a shirt shot flat on a table. Ask directly; it is a one-line question and sellers answer it.
Then the grade moves again
Kits are sold worldwide and graded per market. The same nominal size is not built to the same measurements everywhere, and a shirt manufactured for a domestic Asian market is a different set of numbers from one built for a European or North American one. Rep factories work from whichever sample they got, so the letter you are reading has already been through two rescalings before your order exists. That is the mechanism described in tagged size vs actual size, running several grids at once.
What our record holds on this, which is very little
We publish 57 extracted seller size charts and every one is an apparel chart — length, chest, shoulder, sleeve, waist, hip, leg opening. None is a jersey. Across the 691 items on the shelf, none is a jersey either; the nine sellers whose albums we scraped do not sell them.
The quote corpus is thinner still. Eleven of the 237 comments we hold mention a jersey, and not one of those eleven mentions a size, a fit or a measurement. So nothing on this page is us reading a number off a document. It is the mechanism, and a method that works without one.
The closest documented failure we have
It is a t-shirt rather than a shirt with a crest, but the mechanism is identical and the sequence is the one to learn from:
Not great on the T-shirts, quality is standard some were missing care labels, the sizing was awful ordered medium by the size chart, when it got to agent it was 5cm longer I said and rainbow reps said it will be ok. It arrived and it’s more like XXXL goes to my knees nearly.
u/Only_Bluebird8483, r/FashionReps, 26 January 2026
Read the order of events. The buyer sized from the chart, the discrepancy was caught at the warehouse, and the seller's reassurance was accepted in place of a decision. The measurement was right and it lost to a message.
That is the checkpoint this page exists to protect. A seller saying it will be fine is not a measurement, and the moment to act on a 5cm gap is while the parcel is still in China. The comment sits in full on the RainbowReps evidence page.
The three numbers that actually decide a jersey
Take them off a shirt you already own that fits the way you want the new one to fit, laid flat on a table.
- Chest, flat, armpit seam to armpit seam. Do not double it and do not compare a doubled figure to an undoubled one — pick a convention and hold it on both garments.
- Body length from the high point of the shoulder to the hem, not from the collar seam. Hem length is what makes a shirt read as on-pitch or as leisurewear.
- Sleeve, measured the same way on both shirts. This is where jerseys get slippery: raglan, set-in and cut-on sleeves are all common in kit design and they are measured from different origins. If the two shirts have different sleeve constructions, the numbers are not comparable and you should say so when you ask.
The full method for taking these is in how to measure a garment you own. Shoulder width is deliberately absent from that list — on a raglan or a dropped-shoulder kit there is no shoulder point to measure to.
Two things a tape will not tell you
Ease is your decision, not the chart's. A shirt cut to be worn against the skin and a shirt cut to be worn over a hoodie are different chest figures on the same body. Decide which you want before you look at any numbers, then measure a reference garment already doing that job.
Mesh and body cloth stretch differently. Kits are frequently built from more than one knit — a body fabric with mesh panels at the sides or the back. A flat tape across a relaxed mesh panel and one across a stable body panel are not measuring comparable things, and the stretchier of the two reads smaller and wears larger.
The message to send before you pay
- Which cut this is copied from, the on-pitch version or the supporter version.
- Chest flat, body length from the shoulder high point, and sleeve, in centimetres, for the size you intend to buy.
- A tape laid across the chest of the actual shirt in the QC photos.
The last one matters most, because everything above it is a prediction and that is a measurement taken from the object in the box. Reading QC photos covers what else to look for, and buying rep jerseys covers the parts of a shirt that have nothing to do with fit.
Jersey links die faster than any other category here; the link decoder rebuilds a working buy link out of a dead URL's own shape. Nothing on this page makes any of these shirts anything other than replicas of licensed products.