I attend Soroptimist International meetings where speaking is not encouraged. We put these notes at each place so people can share ideas quietly or can jot down reminders of somethng to bring up later at the meedting or tasks for the future. It has reduced the distraction of side conversations and we are getting more accomplished more efficiently.
This size is perfect for a quick note or bookmark reference. The 3x3's are great as well but lots of times it is too much for the short notation I need to write so it is then a waste of paper.