Package includes: 40pcs book rings, 8 colors: red,blue,green,yellow,orange,purple,rose red,white,clear,black, each color 5pcs Size: 1.77 inch (45mm) outer diameter, 1.5inch (38mm) inner diameter, suitable for your daily needs Operating Instructions: Convenient to use just pull to open and squeeze to close Bright Color Variety: there are 8 bright colors for loose leaf rings, the difference of colors will not only make your work full of interest but also create a color coded organization, providing ease in your daily tasks Multi-function: Use these convenient rings to bind documents, or to link together a multitude of different materials,Great for loose-leaf, memo filing, key rings, scrapbook, binding recipe, photos, book, sample book, scrapbook, contract or file 40Pcs Loose Leaf Binder Rings Colorful Book Rings Notebook Paper Rings for Flash Cards Keychain Key Ring for Books Index Cards Students Teachers Workers School Office,8Colors,1.5inch