I recently made a t shirt quilt. I fused the interfacing on in random sizes. Whatever size seemed to fit the design and cut them all out, they all had a little extra t shirt on them. Then I started laying them out. Some wer 10 inches high. SOme only 3 inches. I put them into rows pretty much based on their height. I trimmed as I went and cut each row to the same height. Some I put 2 t shirt logos together to get the right size. I even used the things on some of the sleeves. It came out really nice. I didn't use sashing but I did add a couple of borders. It came out really nice.