Colmso Durable binders are created with thicker chipboard (.94") than other durable binders (.88") on the market. Different color, size and quantity options are available to meet any office, school, or home needs. The added durability of these binders is the perfect solution for students. Six Fun Colors Selection of 6 diverse colors so that you can coordinate your school supplies to get the fun or chic look you desire. They were made so that they can be colored coordinated per subject. Contemporary design and fun colors brighten up your daily life. 1 inch and 1.5 inch O-ring The slim 3 O-ring binder is 1 inch and can hold 225 sheets of paper,1.5 inch can hold 350 sheets of paper. The round rings are back mounted which leaves a smooth spine so papers will lay nicer and turn effortlessly. These binders rings are easy to open and holds papers securely. These binders cover each page protector when closed allowing your papers to travel undamaged. Customizable Cover Our school supplies binders are Transparent and customizable so they can be made kid friendly or business savvy. Conveniently made with 2 pockets for added storage space. Stay ready and organized for your presentation, business meeting, interview, and more with our 3 ring binders.