I don’t know why interior file folders are so expensive but they are the best invention for filing since sliced bread. Other 3 tab file folders are taller and when you group any of these together in a hanging file folder they stick out over the top of the hanging file. Not only do they look messy you can’t find the label and topic name on the hanging file folder. This just doesn’t help you to find a certain category of files i.e. taxes donations John’s medical... that you want to group together.Professional organizers use these all the time. They are what make your files neat and highly useable. I wish everyone used these all the time so that they would come down in price. The regular cheaper file folders are so old school.