I made a couple for an organization giving them to injured soldiers and I had a bear of a time with the first one. Use a heavier-duty needle in your machine for sure. My machine wasn't working right and when I shook out the quilt, threads kept breaking! It was pure h e double hockey sticks, but I just kept repairing until the quilt held. We were told to use flannel as the batting. Both the quilts I made ended up nice enough but so heavy. They were used to cover soldiers on chilly med planes so I hope the receivers found them cozy enough (I just don't see blue jeans as cozy). I had cut the squares, per specifications, 6-1/2 inches square and people signed the squares with messages of encouragement.