I cannot express how much I love these durable little plastic tabs. I am an opera singer, and have an "aria book," which has my usual audition pieces and other things I work on, with cuts marked clearly for the pianist, and I used to either fold over a regular post-it and write the reviewTitl on it, or just use a folded over piece of paper taped to it. They would wear and get grubby, and if, Heaven forbid, my notebook got wet, they'd get destroyed and I'd have to start all over. Now everything is clear, sharp-looking and color-coded. Thank you SO MUCh for making these!!