Keep a favorite pen at hand with this self-adhesive elastic holder in Charcoal, designed to fit most pens and pencils and to coordinate with the Filofax Refillable Notebooks. The Elastic Pen Loop is compatible with Filofax Refillable Notebook of all sizes: Pocket, Personal, Letter, A5, A4, and Executive Notebooks. Over the years, the Filofax organizer has evolved from a simple loose-leaf system into an indispensable everyday accessory. The Filofax logo promises authenticity and the finest craftsmanship. It's a hallmark of impeccable quality, trusted worldwide, since 1921.