Filofax is the original personal organizer brand and market leader with a reputation you can count on. With over 80 years of experience in the personal organization market, the Filofax brand represents distinctive style and craftmanship. Filofax organizers come in Personal (5 3/8 x 7 1/2 inch), Pocket (4 1/2 x 5 3/4 inch) and A5 (7 7/8 x 9 1/4 inch) sizes. For refills, look for the item number in the spine of your organizer.