This first shirt is a male t-shirt with the Weta logo on the chest and also wrapped around both sleeves.
The second shirt is a male t-shirt similar to the first but it has the addition of the URL on the back.
The third shirt is a long-sleeve female shirt with the Weta log on the chest and the URL on the back. I have no clue why the shirt is so shiny but it's kind of cool.
Here is the same female shirt with a different texture.
I know the Weta logo isn't as clear as it could be; all I did was steal it from their homepage, in a roundabout way, and make the stencils. I had thought about putting an image of The One Ring on the back, but Weta is much more than The Lord of the Rings so I went with the URL.