> ## Documentation Index
> Fetch the complete documentation index at: https://docs.luxima.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Identity and variants

> Name and classify a product, and set up its sizes, colours and GTINs.

## Identity

| Field | Notes |
| - | - |
| **Product name** | Required. You cannot save without it. |
| **Category** | Choose from your company's categories. If you have not set any up, you get a standard list of garment types. |
| **HS code** | The customs code for the product. |
| **Product code** | Your own code for the style. |

> [!NOTE]
>
> If you see "This category isn't mapped to a shared category", the environmental impact is estimated from the materials alone. Click **Map it in Product defaults** to link your category to a shared one for a better estimate.

## Variants

A variant is one version of the product that you sell, usually a size and colour. Each variant has its own passport.

The table has a row per variant with **Size**, **Colour**, **GTIN**, **SKU**, **Weight (g)** and its carbon footprint (**CO₂e**). The first variant is marked **Main**. Rows save one at a time, without **Save changes**.

A variant without a GTIN shows **Missing** in the GTIN column, with its Luxima ID beside it.

### Add or change a variant

* Click **Add variant** and fill in the row. A variant needs at least a size, a colour, a GTIN or a SKU.
* Use the icons on a row to edit it, move it up or down, or delete it.
* Click **Reset to size order** to put the rows back in size order.

A product always keeps at least one variant.

### Weight

Enter a variant's weight in grams if it differs by size. If you leave it empty, the variant uses the product's total weight from the [Materials](https://docs.luxima.io/products/materials.md) section.

### GTINs

A GTIN must be 8, 12, 13 or 14 digits with a correct check digit. Each GTIN can be used only once.

| Message | What to do |
| - | - |
| "A GTIN must be 8, 12, 13 or 14 digits." | Check the length of the number. |
| "That GTIN's check digit is wrong. Check the barcode number." | A digit is mistyped. Compare it with the barcode. |
| "GTIN ... is already used by ..." | Another product has this GTIN. Correct one of them, or [merge the products](https://docs.luxima.io/products/merge-products.md) if they are the same item. |

If the number on your product is not a GS1 GTIN, for example an internal barcode, choose **Keep as non-standard barcode**. LUXIMA stores it as a barcode, and the variant uses a Luxima ID link.

### Passport links per variant

* **With a valid GTIN:** the variant gets a GS1 Digital Link.
* **Without one:** the variant gets a Luxima ID link. It keeps working if you add a GTIN later.

Once the passport is live, each row has **Open passport** and a QR icon to download that variant's QR code. See [Publish a passport](https://docs.luxima.io/products/publish.md).

### Paused variants

A variant marked **Paused** is over your plan's passport limit. Click **Unlock** to make it active, which pauses another passport in its place. A variant marked **Paused by you** was paused by someone in your team; click **Unpause** to bring it back.


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