I use these kinds of clips all the time and in all available sizes. I don't care for the regular paper clips because the papers get unclipped too easily and in dealing with financial reports and information I like to have everything neatly together.
I actually use these as bag clips for chips and cereal. As a result of their small size they are able to fit on the cereal bags without taking up any room in the box. They take up nowhere near the amount of drawer space as actual bag clips and they are so easy to use even my 4 year old can put the clips back on the bags. During Christmas we use them outside to clip holiday lights to the awnings. Oh... so many uses!!