And here's a link to some basic instructions (note that this blogger/crafter did hers freehand, but I've seen some made using store bought or homemade stencils). And obviously, a T-shirt isn't the only item this could be used on, but I do see the appeal. One blogger discussed how many thrift store T-shirts she had. Sounds like a way to get a new shirt for very little money (I always love a bargain)!
Have you seen these? Or even better, made one?
Have a great day!