This shirt was made with a DTG printer. It's just a large inkjet printer, and as such, does not print white. If you want the graphic to pop, like the artwork on post #1, you need a white or ash grey shirt. I just happened to have this darker grey shirt when I was at the printers. That's why it doesn't look as bright.
It doesn't look that big because I am, but it's 14" wide, the max on their printer. Other places have printers that will print 19"X22".
Some places can do black shirts also. They lay down white first, then print on top.
The best part is you only have to do one shirt, where most screen printers have a set-up fee and at least a couple dozen minimum.
The print is soft (you can't even feel it), and holds up to a lot more washings than screen printing.
I've designed and had made about 8-10 shirts and had them printed in the last few years, and they all still look great.
Google DTG printing and your town, and I'm sure you'll see one locally.
The shop that does mine is called Big Frog and they are a national chain.
Oh yea, that's a bumper sticker I'm holding.