Case It Mighty Zip Tab 3 Ring Binder 3 Inch Capacity Expanding File The Case It Mighty Zip Tab 3 Ring Binder is a versatile and convenient solution for organizing and storing documents. With a 3-inch capacity expanding file design, this binder can hold up to 3 inches of documents per ring. The binder is made of durable material and features a sleek black color, making it suitable for any office setting. The regular size of 13.25 x 13.25 inches ensures a comfortable fit for most standard sized documents. The Case It brand is known for quality products, making this expanding file a reliable choice for keeping your important papers neat and tidy.