Note: Make sure the dimension of your image should not be exceeded the exact dimension — 585 pixels wide and 559 pixels tall — or else, you would not be able to upload your avatar on Roblox. How To ...

While we’re in ROBLOX Studio, and we’ve uploaded our brand new clothing to the platform, let’s test to make sure that it looks good! In ROBLOX Studio, open the Plugins tab and click Build Rig.

Testing the Design: After uploading, it's time to test how your shirt looks on an avatar. You can do this by going to your inventory, finding the shirt, and selecting 'Wear'.

How to make shirts and trousers on Roblox. You'll be best off having a couple of templates for this! So take a look at the the image below, and you should gain an idea of what your T-shirt design ...