Three-ring binder fits PADI inserts Water-resistant Cordura won't scuff or tear Credit Card Slots, Pen Holders, Cel-Phone-Sized pocket, Mesh Pocket with Hook Zips closed to keep logs safe 10-inches tall x 7-inches wide Water resistant Cordura construction with zipper and reinforced plastic inner sleeve Measures 7½ x 10 inches and hold PADI and most other log books