I am now obsessed with creating ‘yarn’ from old t-shirts. I’m asking everyone I know for any used t-shirts. If I get enough, I’ll be able to maybe teach a class to some 4-H members. But I’ll need a lot more. I’m also trying to make a full size rug, which would be time-consuming. As the ones above are small and went relatively quickly, each row gets larger and larger and takes more and more time… and patience.
You can find sites that describe how to cut the t-shirts to make the yarn, but make sure the shirts are seamless on the sides (most men’s t-shirts, or unisex). Stains are ok, as most of them you won’t notice. You can also dye some white ones to the colors you want. I would do this before cutting them up. You only use the part from the underarm down. Some writing is ok, as it usually can go unnoticed, but if it is a thicker iron on it may not allow the same stretching as the rest of the shirt and would be noticeable, you’ll just have to see for yourself.
The items above I crocheted, but you could probably knit with it too. Use large hooks or needles and do it loosely or your wrists will get very tired. You could also probably braid it and sew it or weave it to make a rug. I also made some small baskets.