I use 906F Pellon (Hobby Lobby) to fuse to the back of the t-shirts. I cut out different sized blocks divisible by 4, example 12 1/2 x 12 1/2, 16 1/2 x 12 1/2. If all blocks are divisible by 4 you can always fit them together in a random pattern no matter how small or how big. I fill in the blank spots with coordinating fabric which helps stabilize the top, add an inside border, sashing. Use warm and natural batting and 100% cotton coordinating fabric on back. the result is a random pattern of shirts. I would post a pic but I'm new to this board and I don't know how!