yes they are real thread savers can't believe how much thread you save. I use squares right now I am doing 2" squares for two patches then will do 4 patches. when have enought will put them into a scrap quilt. so when cleaning up from a project I cut the 2" squares if can get them if bigger do 2 1/2" squares. then have them sorted light and dark by the machine in small plastic bin ready to sew.