Just when you thought your stationery supply closet had everything in it, meet the X-Shaped Rubberband. It's super strong and has « holding power » on four sides, instead of two like a traditional rubberband. Great for slipping around books or notebooks to prevent loose papers from falling from any side, or for a thick stack of paper – or whatever – that needs securing on all sides. Each box contains 12 X-Bands: four small, four medium and four large; one of each color: Green, Red, Purple and Yellow.