Here is what you need to make your own...
Plain white tee
Paint in 2 colors (or more!)-- I used acrylic and it worked just fine.
1. Lay your shirt flat on a hard surface and place a piece of cardboard inside the shirt. This will keep the excess paint from soaking through the other side of the shirt!
2. Mask off the stripes with tape. You can space them as close together or as far apart as you like, just remember that the taped portions will remain white. You can use a ruler if needed to keep your lines straight. I also used the tape to mask off around the sleeves so that I didn't make any paint boo-boos.
3. Get your paint and roller ready. I wanted an uneven/worn look so I just rolled the paint on without much care. If you want a more even/solid line then be sure to get an equal amount of paint all around the roller and re-load with paint often. Let stripes dry completely before removing the tape.
4. Once the stripes are dry and tape is removed, it's time for lettering! I wanted to stick with the French theme but I wasn't particularly fond of the phrase "Bonjour- je mapelle" (Hello, my name is). I chose instead to use "Bonjour- Mon Amour" which means "Hello, my love". You can use whatever phrase you like here! Simply dab the paint on your letter stencils and place them down on the shirt where you want it to go. If you want to be really precise you can always measure and mark, lightly, where each letter should go. But I kind of like the imperfect look of homemade, myself. :)
5. Once all the paint is good and dry, you can remove any tape or cardboard from the shirt and toss into the wash on a normal cycle. I have washed mine twice and it's holding up just fine!