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.

Every game in Roblox is made via the Create tab and comes with a free-to-use app called Roblox Studio. From there, you can use the app to make whatever you want.