Just remember to make your design at 300dpi or higher (in photoshop). I imagine vector art is better, but when I went we just had to make sure to be at 300dpi.

Just remember to make your design at 300dpi or higher (in photoshop). I imagine vector art is better, but when I went we just had to make sure to be at 300dpi. I was making shirts for a bike race. We broke even on the shirts.