How do you make t-shirts for free on roblox

First start with your image, either find one on the internet or make your own with an image editing software such as Paint or Gimp. Then go your stuff and go to T-shirts and click Create, go to browse and find your picture (Use appropriate imagery please! Or you will either get a warning or be banned) And press open and then click Create T-shirt.

Hope that helps!
Grunty.