I have a question about printing t-shirts.....I want to start a business that sells t-shirts and other screen printed clothes and accessories that have my own designs on them. I'm thinking of doing more of the kind of designs that go up the right or left side of the front of the shirt, and not as many deisngs that go straight in the middle. I'm also probably going to do specifically girl shirts. So my question is that do I have to adjust the size of the deisgn for every different size shirt? If not, the design would look correct on a small or medium shirt, but much smaller on a large or xl shirt. Do you all set up your screens to do every size from one design, or do you have to set up different screens for every different sized shirt, because you might have to make the design bigger for bigger shirts?