To create a shirt on Roblox:
- Log in to your Roblox account.
- Click on the “Create” button on the top navigation bar.
- Select the “Shirts” option from the drop-down menu.
- Use the “Paint” feature to design your shirt by selecting different colors, brushes, and shapes.
- When you are satisfied with your design, you can click on the “Save” button to save your shirt.
- Give a name for your shirt and set the price for the shirt.
- Click on the “Publish” button to make your shirt available for sale in the Roblox marketplace.
You can also use the “Upload” feature to upload an image file of your design if you have created it in an external image editing software.
Keep in mind that you will need to have a Roblox Premium membership to be able to sell your shirt in the marketplace.