This package includes 2 sets of six tabbed dividers, in a total of 12 pieces. You can color code, number, or label each topic. Mr. Pen 3 ring binder dividers are made of quality material. Each plastic pocket folder is flexible, tear-resistant, durable, easy to clean, and water-resistant. Each binder divider measures 8.5 by 11 inches. From sorting your classes to putting together a work portfolio, tabbed dividers are an essential part of a well-cataloged binder. Mr. Pen binder dividers help you stay organized at school work, home assignments, office workplace, projects, presentations, archiving, filing and storage.