To make a tee shirt quilt, cut the whole front off a tee shirt. Then fuse a lightweight fusable interfacing to the back. Some prefer a woven interfacing, or a tricot interfacing with the knit lines going side to side and the tee shirt knit line going up and down but I prefer a light weight non woven Pelon. After the interfacing is fused on the back, then and only then, cut the tee shirts the size blocks you want then. Then, add sashing between the blocks and machine quilt it. I like to use just an overall stipple pattern to quilt it. I have made several quilt and hanve another one to make for my son's high school graduation in May. They are fun to make and they are one of a kind for the person recieveing them.