Only members of the Roblox Builders Club can make shirts and pants but no membership is required to make a T-shirt.

Much like most things on Roblox, you will be making this yourself from scratch, so you'll need to design a t-shirt in an image and then upload it to Roblox.

How to Make T-Shirts in ROBLOX T-Shirts are the easiest clothing to make in ROBLOX. Create an image that’s ideally 512x512 pixels and then upload it to ROBLOX via the Asset Manager in ROBLOX Studio.

Roblox is going to let creators sell physical items from their games. It’s opening up its Commerce APIs to eligible Roblox creators, and Shopify is the first “integrated partner” for the APIs.