I just finished 5 denim and flannel rag quilts. One for each of my grandchildren. My neighbor brought over to me a wheel barrow (yes-a whole wheel barrow) full of denim jeans that the thrift store she volunteers at was going to toss them and she knew I was a quilter. I invited my friend over one day and we just used rotary cutter, scissors, and plastic templates and cut all day. We got a lot of squares in many sizes. She took a lot home and I still had a lot of squares to use up. I sewed around all four sides and then sewed an "x" in the center of the square to make it more stable. Now comes the hard part of clipping. You are right "Suz" to get the extra large denim jeans as we could sure get a lot of squares out of the bigger jeans.