I am trying to make a scrap quilt. I sewed some 1 1/2 inch strips and then cut them four and 1/2 inches and made long pieces to the length I wanted. All the strips are the same length and I also made sashing to go between each piece. My problem is as I added each piece the pieced pieces all started getting one to 1/2 inch shorter all the way to the other side. I can't figure it out as all the pieces were cut from the same piece I used the scraps for.
Can someone help me figure out what I did to make them shorter or shorten?
I sewed with a 1/4 seam and sewed straight.