Google Analytics choice
GA4 loads only if you accept. Cookie-free Ahrefs Web Analytics runs independently. See our privacy policy. This choice does not manage advertising consent.
Buying guide
Use this guide for UK football shirts, US soccer jerseys, 2026-27 club kits and national-team shirts. Regional labels can differ, so treat the brand tables as orientation and the chart on the exact current product page as authoritative.
Last updated
Quick answer
Do not rely on “always size up” or a fixed conversion from your everyday T-shirt. Confirm whether the listing is replica, authentic, women's, men's, unisex or kids', then compare its current chart with a shirt that already fits you. Measure pit to pit and body length on a flat surface, but first check whether the retailer's chart shows body measurements or finished garment dimensions. Compare like with like; for a body chart, measure around the wearer's chest rather than treating shirt width as body size.
Privacy-safe size check
This uses a generic official body-chest chart for orientation only. Your body-chest value and oriented size stay in this component: they are not saved to Locker or browser storage, added to a URL, or sent to analytics. FKB may count only the bounded maker, buyer context and whether the check returned an orientation, boundary or fail-closed state.
Measure around the fullest part of the body chest with the tape horizontal. Do not enter a flat pit-to-pit garment width.
Sources reviewed 13 July 2026: Nike UK men’s tops and Adidas UK men’s shirts & tops. Nike/adidas kids links are guidance only; FKB does not calculate a child’s size from one measurement.
These are common tendencies, not guaranteed specifications. Manufacturers use different names and can change construction between clubs, national teams and product cycles. Open both exact product pages before choosing.
Use the full authentic vs replica buyer matrix →Replica (fan)
Authentic (player)
Nike's current men's tops chart uses body measurements, not flat garment dimensions. These chest ranges were checked against Nike UK on 13 July 2026; the size guide attached to the exact stadium or match shirt still takes priority.
| Size | Body chest | Measurement type |
|---|---|---|
| XXS | 28.1–31.5 in | Around the fullest part of the chest |
| XS | 31.5–35 in | Around the fullest part of the chest |
| S | 35–37.5 in | Around the fullest part of the chest |
| M | 37.5–41 in | Around the fullest part of the chest |
| L | 41–44 in | Around the fullest part of the chest |
| XL | 44–48.5 in | Around the fullest part of the chest |
| 2XL | 48.5–53.5 in | Around the fullest part of the chest |
| 3XL | 53.5–58 in | Around the fullest part of the chest |
| 4XL | 58–63 in | Around the fullest part of the chest |
Adidas' current UK shirts-and-tops guide also uses body measurements. These chest ranges were checked on 13 July 2026. Compare the exact replica or authentic listing as well, because the generic maker chart does not prove two versions fit alike.
| Size | Body chest (cm) | Measurement type |
|---|---|---|
| XS | 83–86 cm | Around the widest part of the chest |
| S | 87–92 cm | Around the widest part of the chest |
| M | 93–100 cm | Around the widest part of the chest |
| L | 101–108 cm | Around the widest part of the chest |
| XL | 109–118 cm | Around the widest part of the chest |
| 2XL | 119–130 cm | Around the widest part of the chest |
| 3XL | 131–142 cm | Around the widest part of the chest |
Puma and smaller makers
We do not publish fixed Puma, JAKO, Hummel, Capelli Sport or Umbro conversions without a current source that clearly applies to the exact product. A generic maker chart can be useful, but a club replica, player shirt, teamwear top and youth kit may use different measurements even when the label is the same.
Puma’s current official guide explains how to measure and converts regional clothing labels, but it does not publish a generic body-chest range that safely decides a football-shirt size. Open the exact replica or player-shirt listing and use its attached guide.
Open the current official size guide →Use the retailer chart attached to the exact national-team product; do not transfer a teamwear measurement to a supporter shirt.
Find the relevant team guide →Confirm the current club or retailer product chart and whether the value describes the body or the finished garment.
Find the relevant team guide →Treat each federation or retailer listing separately, especially for youth products and stock imported from another region.
Find the relevant team guide →Start by checking whether the exact shirt is labelled women's, men's or unisex. A UK dress size does not convert reliably into a football-shirt letter size, and “size down two” is not a safe universal rule. Use your bust or chest measurement and the current product chart instead.
Some club and national-team shirts are available in a dedicated women's fit, while others are offered only in adult or unisex sizing. Shoulder width, body shape, length, stock and price can all vary by model and retailer, so compare the exact options rather than assuming two shirts with the same badge fit alike.
Check whether the product is women’s, men’s or unisex; the same letter is not a cross-cut conversion.
Use the chest or bust method named by that chart and keep the tape level around the fullest point.
Check shoulder, body length and fit wording on that shirt rather than another item from the maker.
Try an unprinted shirt first wherever possible; personalisation can change change-of-mind rights.
Age labels are a shortcut, not a measurement. Use the child's current height and chest, then check the exact shirt or full-kit chart. Brands and product lines do not use identical age bands, and a shirt-only listing may size differently from a set containing shorts and socks.
Measure without shoes and use the exact product chart’s method.
Measure around the fullest part while the child stands naturally.
Check whether the listing is a shirt, mini kit or multi-piece set.
Choose the desired room for play or layering; do not guess a fixed growth size.
FKB's kids checker returns a generic chart orientation only when height and chest independently identify the same Nike or adidas row. Boundaries, conflicts, missing measurements and unsupported makers deliberately stop at the official chart. The measurements are never saved, placed in a URL or sent to analytics.
Use the height-and-chest kids fit check →These checks apply to official club stores, brand sites, established retailers and marketplace listings. A recognisable platform does not make every third-party seller, size chart or return policy identical.
Size checked?
Start with the current club or national-team guide, check official status and only then open a retailer. Revisit the product chart immediately before checkout because a different version of the same shirt can use different measurements.
The marketplace button is an Amazon affiliate search. Results can mix sellers, seasons and shirt versions; verify the listing and return terms before buying.
Club season 2026-27
Try today's five-shirt quiz, build your tier list, or filter by club, maker and official status.