Air Jordan 4 Real vs Fake: Size Tag Check

Why the Size Tag Is the Check That Works on a Jordan 4

Most Jordan 4 guides send you to the usual places: the netting, the wings, the Jumpman, the heel tab. Those are worth a look, but on the high-value colourways the strongest evidence we have found is the printed label inside the shoe. Fakers have to print a tag for every colourway they sell, and they often get it wrong in ways that have nothing to do with how good the shoe looks.

The catch is the one every honest guide has to admit. Some fakes copy a genuine tag whole: the right style code, the right factory code, the right layout, even plausible dates and a plausible UPC. A tag like that tells you nothing. So the rule for this guide is narrow: a tag that does not match the colourway means the pair is fake, and a tag that does match proves nothing. Every check below asks one question: does this tag belong on this shoe, made in this window?

The guide covers adult sizes of the non-collab colourways that get faked most: Black Cat (2020), Military Black (2022), Red Thunder (2022), Bred (2019), White Cement (2016), plus short notes on Cool Grey (2019) and Thunder (2012). It does not cover grade school, preschool or toddler pairs, which carry different style codes, and it does not cover collaborations such as the Travis Scott pairs, whose tags and details differ.

Which Jordan 4s This Covers

Listings often call a pair by a name that does not match its tag, and the tag is what you are checking, so start by naming the pair precisely. Use the retail style code for the colourway, which is printed on the tag and on the box label.

• Black Cat (2020): CU1110-010.
• Military Black (2022): DH6927-111.
• Red Thunder (2022): CT8527-016.
• Bred (2019): 308497-060.
• White Cement (2016): 840606-192.
• Cool Grey (2019): 308497-007.
• Thunder (2012): 308497-008.

The first five codes are confirmed by retailer and release-calendar pages. For White Cement 2016 and Thunder 2012 we could not confirm the code on the web; the genuine pairs we examined carry it, so treat those two as observed rather than published. Also watch the name: "Toro Bravo" is an Air Jordan 6 colourway, so a Jordan 4 listed under that name is a mislabelled listing before it is anything else.

Read the Size Tag in Three Steps

The tag is stuck to the lining inside the shoe, near the tongue. Photograph it flat, in daylight, close enough that every character is readable.

• Read the style code and the colourway. Match the code to the list above. A code from another shoe, or one that does not exist for a Jordan 4, stops the check.
• Read the layout, the factory code and the dates. The factory code is a two or three character code near the top right (LN3, VW1, SZ and so on). Layout means QR code or older barcode. Both must fit the colourway and the date window in the table below.
• Read the UPC and look for repeats. The UPC should start the way genuine pairs of that colourway start, and it should not be the same UPC you have seen on a different colourway.

Here is what a genuine tag looks like, read as a set.

How to read the table: this is what we saw on genuine pairs, not a Nike specification. Nike does not publish its label rules, so every row means "consistent across the genuine pairs we have examined". The production dates fit the release dates (Black Cat in January 2020, Military Black in May 2022, Red Thunder in January 2022, Bred in May 2019, Cool Grey in August 2019). The Black Cat row also rests on a published legit-check from LegitApp. Cool Grey and Thunder rest on fewer genuine examples and few fakes, so use them as "also check" rows, not as tells.

QR is not universal. Bred 2019 and White Cement 2016 genuine tags use the older barcode layout, so judge the layout against the colourway and the date, never against "newer is better". The dates are printed as a pair, usually month, day, year.

Style Code Against the Colourway

This is the quickest filter and the one a listing photo answers in seconds. Fakes that fail it usually carry the code of a different shoe.

A concrete example. One Black Cat fake we examined carried 405452-010 with the colour word TAN and Vietnam production dates in 2022. It looks like a mistyped copy of the grade school Black Cat code, 408452-010, and in any case it is not CU1110-010. We would not build a rule on that one pair, but it shows the kind of mistake that survives a fast look at the shoe and dies on the tag.

Layout and Factory Code Against the Colourway and Date

This check is stronger than the style code because a faker has to know three facts at once: which factory made that colourway, which layout it used in that year, and which factory codes do not belong.

On the genuine tags we examined, a given colourway kept to one layout and one or two factory codes. On the counterfeit tags that failed, the usual faults were:

• A barcode layout on a colourway that carries a QR code, as on the Black Cat tag above (CU1110-010 on an older barcode layout, factory code LN4, Vietnam).
• A QR layout on a colourway that carries a barcode, for example a White Cement or Bred tag printed in the newer QR style.
• A foreign factory code: Y3, LN4, SZ, VT or QT where LN3 or VW1 belongs. A Red Thunder, for instance, prints VW1 on genuine pairs.
• A "136013" style code with LN4 and Vietnam, in the old barcode style, on a colourway that has nothing to do with it.

In our reviews, roughly half of the Black Cat fakes with a legible tag failed this check, and on Military Black, Red Thunder and Bred nearly every fake with a legible tag did. The genuine tags we read never did, on any colourway. That is the whole case for reading tags carefully. It is also not a guarantee: the genuine sample for each colourway is modest, so we word this as "consistent across what we have seen" and not as a rule Nike has published.

Compare these two genuine tags for what a clean Red Thunder and a clean Military Black look like. The Red Thunder is a Vietnam tag with VW1, which is correct. The Military Black is a China tag with LN3.

Now the Military Black fake. Its style code is correct, but the factory code is VE, and the second date reads 19/09/21, which cannot be a month-first date. We did not see that on the genuine Military Black tags we read.

Production Dates Against the Release Window

The two dates on a modern tag are production dates. They should fall before the release of that colourway and in the window above. We rate this lower than the layout check for two reasons. The dates are easy to get right if the faker copies a genuine tag, and Nike may have produced extra batches we have not seen.

A genuine Black Cat pair we examined carries dates in autumn 2019, well before the January 2020 release. A Military Black genuine pair shows production from September 2021 to January 2022, before the May 2022 release. On a Red Thunder, genuine dates sit in the first half of 2021, before the January 2022 release.

The tell is a date that cannot be right: a 2020 or 2021 date on a shoe from the 2012 or 2016 era, a date after the release, or Vietnam dates from 2022 on a Black Cat when genuine pairs we have seen were made in China in 2019. A Thunder 2012 fake in our reviews carried a DH6927 code on a QR tag with 2019 dates, so the code, the layout and the date all failed.

We cannot rule out a later Black Cat restock with a different tag. Our wording is the narrow one: the production dates on the genuine pairs we have seen fall between mid-2019 and early 2020.

The UPC Prefix for the Colourway

On the genuine pairs we examined, the UPC on the tag starts with the same digits for every size of one colourway, and the prefixes differ between colourways (see the table above). That makes the UPC an internal consistency check. A Military Black tag whose UPC starts 0019449, or a Cool Grey tag with a foreign UPC, does not match the genuine prefix for that shoe.

Be careful with how much weight you give it. This is an observation, not a Nike specification, and there is no official lookup to confirm a UPC, so a wrong prefix is a prompt to look harder, not a verdict on its own. We rate it as useful but not decisive.

The Same Tag on a Different Shoe

This is the most useful check for a buyer comparing several listings, and it is easy to run. Genuine UPCs follow one prefix per colourway and do not repeat across colourways. Fakers recycle tag templates. We saw the same lot and UPC pattern on tags from different colourways: for example, the same old-style tag (style code 136013, LN4, Vietnam, 09/10/16 dates, UPC 00666003888524) on a counterfeit Red Thunder and a counterfeit Bred. Two different shoes, one template.

Compare these two tags. They come from two different colourways. The dates, the UPC and the lot line beneath the barcode are the same; only the end of the style code changes.

We saw the same behaviour with other UPCs: a few UPCs appeared on counterfeit tags of several colourways, including Black Cat, Cool Grey, White Cement, Bred and Military Black. A genuine pair does not carry a UPC that also appears on a different colourway.

When the Tag Looks Perfect

Some counterfeit tags are perfect copies. We examined more than one Black Cat fake that reproduces a genuine tag in full: CU1110-010, LN3, Made in China, the QR layout, plausible 2019 dates and the right UPC prefix. Others had the right code, LN3 and QR, with small differences such as 2021 dates. On the full copies the tag gave us nothing.

Compare it with the genuine Black Cat tag near the top of this guide. We cannot find a difference in this photo. The pair failed authentication, but not because of anything printed on this tag.

That is why the tag is a filter and not a pass. If it fails, stop. If it passes, you have learned that the pair is not a careless fake, and you still need the rest of the shoe checked against a confirmed pair of the same colourway: the shape of the toe box, the netting, the wing, the leather or nubuck and the sole. For sneakers in general, the sneaker authentication guide covers those checks.

The older tags are worth a second look for the same reason. A genuine Bred 2019 tag uses the barcode layout, LN3, China and dates from late 2018 to early 2019. A genuine White Cement 2016 tag uses SZ, China and 2015 dates, with style code 840606-192 on the genuine pairs we looked at.

Details Fakes Also Copy

Three popular tells do not work on a Jordan 4, and we include them because they come up in every legit-check thread.

• "Made in Vietnam". This is not a tell. Genuine Red Thunder pairs are made in Vietnam, and so are genuine grade school pairs. Check the origin against the colourway, not against a belief that China is the only correct answer.
• LN3 against LN4. Neither is wrong on its own. LN3, LNM, VW1, Y3 and SZ all appear on genuine pairs in different years. The question is whether the code fits the colourway and date.
• The heel Jumpman. The glossy Jumpman with a dotted stitched border on the heel on the genuine Black Cat pair we photographed has the same dotted stitched border that some guides treat as a fake tell. We do not use it as one.

The Flight Jumpman on the Tongue

On the Black Cat, the genuine tongue logo is tone on tone: a dark grey Jumpman and Flight script on a black tongue, which is subtle in photos. On some fakes we saw the same logo brighter and larger. That can be a real difference, but photos and lighting change how bright a logo looks, so we give it a low rating. Use it only after the tag has raised a question, and compare it with a genuine pair of the same colourway photographed the same way.

The Heel Liner Jumpman

On one Black Cat fake we saw a red Jumpman on the heel liner. We have seen it once, we have not confirmed that genuine pairs never carry it, and we would not reject a pair for it. It is a reason to check the tag, not evidence.

Quick Authentication Checklist

• Name the pair by its style code and confirm it is an adult Jordan 4, not a grade school pair.
• Photograph the size tag flat and read every line.
• Match the style code to the colourway.
• Match the layout (QR or barcode) and the factory code to the colourway and date window.
• Check the production dates against the release window.
• Check the UPC prefix, and look for the same UPC on another colourway.
• If the tag passes, move to the shoe itself and compare it against a confirmed genuine pair.

One failure on steps 3 to 6 is enough to walk away. Passing all of them means only that the tag is plausible.

When to Get a Professional Opinion

The tag stops the careless fakes, and the careful ones copy it. When a pair has a perfect tag and a high price, the decision rests on construction details that need confirmed pairs of the same colourway to compare against, and those are hard to judge from listing photos. A second opinion is cheap next to a four-figure pair.

LuxeDetect sneaker authentication has a 24-hour option and returns a verdict with a Certificate of Authenticity. Submit your Jordan 4 for authentication with clear photos of the size tag, the tongue, the heel and the sole. If you also buy Jordan 1s, the same tag-first habit applies, and our Air Jordan 1 guide covers the checks for that shoe.

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