---
title: Creating a collection
slug: nftportal/creating-a-collection
docTags: 
createdAt: 2022-04-15T11:22:02.000Z
---

NFTs can be sold as single items or within a collection. Only the creator of a collection can add NFTs to it.
A collection has its background image, description, optional webpage and/or social channel link.
Within the collection, attributes on NFTs are calculated by rarity.

## Upload the collection information 

Start adding a new collection by clicking the **Create **button on the portal's top.
Select creating a collection.

![](https://api.archbee.com/api/optimize/l2AIpSUU6srSQmG1-K2bb/3T-xetP36Vigct4dPgy-a_createcollectionlight.png)

On the next page, you can enter the details for your collection

![](https://api.archbee.com/api/optimize/l2AIpSUU6srSQmG1-K2bb/o1aU6PWIh5GOr33D3_Wcy_createcollectionformlight.png)

- **Name**
  You can set a Collection name of up to 32 characters.
- **Description**
  Tell everyone what the collection is about. Up to 384 characters.
- **Official Website**
  If you want to share a website for the collection, put it here.
- **Social Platforms**
  If you want to share a social platform for the collection, put it here.
- **Collection Banner**
  This is the background image of your collection page. When you select one, it will be uploaded to the Pinata Cloud.
  Recommended size is 1600 x 350 pixels, and the maximum size is 10 MB for the upload.


**Preview Collection** lets you check the details <u>before</u> storing them on the blockchain.

Finalize the creation by clicking the **Create a collection** button.
In the XT-Wallet, you must confirm the collection creation on the Signum blockchain. The transaction has a Signum Network fee of only 0.05 Signa. After 4 to 8 minutes, your collection will be stored and ready to use.

:::hint{type="danger"}
⚠️**Important note**
Once you have transmitted the collection settings to the Signum chain, these values are immutable; you can no longer edit or update this information.
:::