Since I’ve never done it accidentily. How would I go about shrinking a pre-shrunk %100 cotton t-shirt. Is it even possible to shrink a pre-shrunk t-shirt?
I would say you could. I think I’ve noticed t-shirts shrinking that have been labeled “pre-shrunk”.
If you want to give it a go, wash it in really hot water, and dry it in a really high heat dryer.
But don’t burn it.