I am a small business owner and occasionally write a report that has multiple copies of many pages. The five-ream case is just the right size for my copier as well as for my three printers. Buying one ream at a time is too expensive. Buying a ten-ream case is too much and the box is too heavy to carry easily. I like the five-ream case that lasts me for a few months. It is also lighter and easier to carry from the store to my car and then into my house and up a flight of stairs to the office where the copier is.