I have been asked to make a tshirt quilt for my wonderful SIL from all her marathon tshirts. I have ironed the fusible Pellon to them and have cut them out. I am currently building each logo to 12.5" so that they are all the same size. The finished block is supposed to be 21" sq, and the quilt will be a king size when done. I would like to try a Triple Irish Chain with this, but my brain is in hibernation. If possible, can someone figure out the size of the stips that I sew together and the size that gets sewn onto the block. The pattern I want to use is from Quilter's Cache TIC but, I can't seem to get my head around the math. I wish I had my EQ7, but, I'm not ordering it until the end of the week. So any help would greatly be appreciated...unless I have made you all as confused as I am.