Nike Shoe Tag Explained: Style Code, Date Code, UPC & More

The small label inside every pair of Nike and Jordan sneakers is the shoe's ID card. Once you know how to read it, the Nike shoe tag tells you exactly which model and colorway you're holding, its size in several regional systems, when it was produced, and where. That makes it one of the most useful tools for both identifying a sneaker and authenticating it.

It's also where counterfeiters slip up. Copying a shoe's shape and materials is hard, but plenty of fakes give themselves away with a few lines of small print.

This guide explains every field on a Nike size tag, how to look up the codes, and the tag mistakes that expose fakes.

Quick answer: A Nike shoe tag shows the size in several systems (US, UK, EU, cm), the style-color code (for example, DD1391-100, where the first part identifies the model and the last three digits identify the colorway), the production date range, the country of manufacture, and a UPC barcode. Matching these details against the box label and the official product listing is one of the most reliable ways to identify and legit check a pair.

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Where to Find the Tag

On most Nike and Jordan sneakers, the size tag is sewn onto the back of the tongue. On some models, it's stitched to the inside wall of the shoe, near the heel or on the inner side. Running shoes and some newer designs may place it elsewhere inside, so check the whole interior if you don't spot it right away.

If the tag has faded with wear, the box label carries most of the same information.

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Every Field on a Nike Size Tag

Field	Example	What it tells you	How fakes get it wrong
Sizes	US 9 · UK 8 · EUR 42.5 · 27 cm	The shoe's size in several regional systems	Conversions that don't match Nike's chart
Style code	DD1391	The model and design	A code that belongs to a different shoe
Color code	100	The specific colorway	A color code that doesn't match the colorway
Production dates	A date range in MM/DD/YY format	The window when the pair was made	Dates that make no sense for the release
Country	Made in Vietnam	Where the pair was manufactured	Rarely decisive on its own
UPC barcode	A 12-digit number	The exact style, color, and size	A barcode that doesn't match the box label
Other codes	Factory and batch numbers	Nike's internal tracking	Hard to verify independently

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The Style-Color Code: The Most Important Line

The style-color code is the single most useful piece of information on the tag. It has two parts:

1. The style code identifies the model and design. Older Nike codes are six digits (for example, 555088 for the Air Jordan 1 Retro High OG). Newer codes typically use two letters and four digits (for example, DD1391 for the Nike Dunk Low Retro).
2. The color code is the three digits after the hyphen, and it identifies the colorway. DD1391-100 is the White/Black "Panda" Dunk Low.

Together, the style-color code points to one specific product. Search it on Google, Nike's website, or a major resale platform, and you should see your exact shoe. That's why the code is the backbone of sneaker identification. It's also why mismatches are such a strong red flag.

What the First Digit of the Color Code Means

The first digit of the three-digit color code tends to reflect the shoe's dominant color family. This is a widely observed pattern rather than an official Nike rule, so treat it as a quick sanity check, not proof:

First digit	Usual color family
0	Black
1	White
2	Brown / tan
3	Green
4	Blue
5	Purple
6	Red / pink
7	Yellow / gold
8	Orange
9	Multicolor / other

Some examples: the Panda Dunk (DD1391-100) is white-based, and the Air Jordan 4 "Black Cat" (CU1110-010) is black. The pattern isn't perfectly consistent, though. The 2015 Air Jordan 1 "Chicago" is 555088-101, while the 2022 "Lost & Found" version of a similar colorway is DZ5485-612. Use the color code to confirm a match, not to guess a colorway.

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Production Dates

Nike size tags usually show a production date range, two dates in month/day/year format indicating when that pair was made. For most releases, this window falls a few weeks to several months before the shoe hits stores.

How to use it:

• Dates that make sense: A production window shortly before the release date is normal. Restocks can carry later dates.
• Red flags: Dates that fall long before the model or colorway even existed, date ranges that are illogical (the end date before the start date), or blurry, misaligned printing.

Production dates are also handy for collectors. They help you tell an original release from a later restock of the same colorway.

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Country of Manufacture

Nike manufactures sneakers in several countries, most commonly Vietnam, China, and Indonesia, along with others such as India. "Made in China" does not mean a pair is fake. The same model can be produced in different countries across production runs.

The country is rarely decisive on its own, but it should be printed cleanly and consistently with the rest of the tag.

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The UPC Barcode (and Why Scanning It Isn't a Legit Check)

The UPC barcode encodes a 12-digit number unique to a specific style, colorway, and size combination. It appears on both the size tag and the box label.

Can you scan the barcode to check if Nikes are real? Not on its own. A barcode scan only tells you which product that code is assigned to. Counterfeiters routinely copy UPCs from real pairs, so a fake can scan perfectly.

What the barcode can do is catch inconsistencies:

• The UPC on the size tag should match the UPC on the box label
• Searching the UPC should return the same model, colorway, and size printed on the tag

A mismatch is a strong red flag. A match is just one box ticked.

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The Box Label Should Match the Tag

The box label repeats most of the size tag's information: the model name (for example, "NIKE DUNK LOW RETRO"), the style-color code, the size, the UPC, and the colorway, written in Nike's color format (for example, "WHITE/BLACK-WHITE").

Every shared field should match exactly. Keep in mind that boxes can be swapped or faked separately, so a matching box supports authenticity but doesn't prove it.

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Nike Size Conversion Chart (Men's)

Fakes often print size conversions that don't follow Nike's own chart. Here's the men's chart for the most common sizes:

US	UK	EU	CM
7	6	40	25
7.5	6.5	40.5	25.5
8	7	41	26
8.5	7.5	42	26.5
9	8	42.5	27
9.5	8.5	43	27.5
10	9	44	28
10.5	9.5	44.5	28.5
11	10	45	29
11.5	10.5	45.5	29.5
12	11	46	30
13	12	47.5	31

For Nike women's sizes, add 1.5 to the men's US size (a men's US 9 is a women's US 10.5). Other brands convert differently. Adidas, for instance, uses a different UK and EU scale, which we cover in our sneaker size guide.

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How Fakes Get the Tag Wrong

These are the most common tag mistakes on counterfeit Nike and Jordan sneakers:

1. A style-color code for a different shoe. The code searches to another colorway, a different model, or nothing at all.
2. Incorrect size conversions. For example, a men's US 9 printed alongside an EU size Nike doesn't pair with it.
3. Font problems. Characters that are too bold or too thin, uneven spacing, or letters sitting slightly above or below the line.
4. Illogical production dates. Dates that don't fit the release.
5. Poor print and material quality. Fuzzy text, ink bleed, or a thin, papery tag.
6. Mismatches with the box label. A different size, code, or UPC on the box.
7. The wrong tag layout for the era. Nike's tag designs have changed over the years, and some fakes use a layout that doesn't match when that release was produced.

No single tag issue is a verdict on its own. Tags fade and fray with wear, and print quality varies a little between factories. Several issues together are a different story.

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Using the Tag to Identify and Legit Check a Pair: Step by Step

1. Read the style-color code from the tag (or the box label if the tag is worn).
2. Search the code to confirm the model, colorway, and release.
3. Check the size conversions against the chart above.
4. Check the production dates against the release timing.
5. Compare the box label field by field.
6. Compare print quality with retail reference photos of the same release.
7. Check the shoe itself. The tag is one piece of evidence. Use our model guides for Nike Dunks, Air Force 1s, and Jordan 4s to finish the job.

If you're trying to name a shoe rather than authenticate it, our guide on how to identify sneakers from a picture covers the fastest methods.

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Frequently Asked Questions About Nike Shoe Tags

Where is the size tag on Nike shoes?

Usually on the back of the tongue. On some models, it's sewn to the inside wall of the shoe near the heel or on the inner side.

What do the numbers on a Nike shoe tag mean?

The key number is the style-color code (for example, DD1391-100). The first part identifies the model, and the last three digits identify the colorway. The tag also shows sizes in multiple systems, a production date range, the country of manufacture, and a UPC barcode.

Can I look up Nike shoes by style code?

Yes. Search the full style-color code on Google, Nike's site, or a resale platform, and you should find the exact model and colorway. It's the fastest way to identify a pair.

Do fake Nikes have real UPC codes?

Often, yes. Counterfeiters copy UPCs from authentic pairs, which is why a barcode scan alone can't prove a shoe is real. A UPC that doesn't match the tag or box is a useful red flag.

My Nike tag is worn off. Does that mean my shoes are fake?

No. Tags fade and fray with wear, especially on older pairs. A missing or unreadable tag does make authentication harder and can lower resale value, so keep the original box if you have it.

Do Jordan Brand sneakers use the same tag format?

Yes. Jordan Brand size tags follow the same structure, with sizes, a style-color code, production dates, country of manufacture, and a UPC, so everything in this guide applies to Jordans too.

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The Nike shoe tag is a few square centimeters of fabric, but it carries a surprising amount of information. Learn to read it, cross-check it against the box and the official listing, and you'll identify pairs faster and catch fakes that look fine at first glance.