I've been working on a quilt top which has over 20 different pieces. It's been very slow going and sometimes confusing trying to find the pieces I need at a given moment. I was using little Post-Its, but then they kept falling off and getting lost. These markers have really helped. They are easy to see and, pinned on well, they stay put! I pin so they dangle down the side of each stack and can be seen at a glance. I plan to get more in other colors.