Fits a standard office binder (with a capacity of 1.5" to 2"). We do have a larger binder case available for 3-4" binders - please see our other listings. You can purchase this cover as a stand-alone version, but to really get the intended functionality out of your cover check out the detachable Hook and loop fastener options that can be used to completely customize your cover to suit your needs (see our Seller Profile Store). The Add-ons that are compatible with this cover are shown in the pictures above. The front of the cover features two pockets. Both pockets flip up to reveal a large area with elastic loops designed to hold pens and pencils. There are a total of 18 loops for storing writing instruments.On the underside of each flip-up pocket is a clear window, which can be used to store maps, or notes for see-through viewing.Bottom front pocket flap has a see-thru mesh pocket for the storage of cell phone, keys etc.Inside this binder cover is over 155 square inches of Velcro real estate - to allow for Add-on customization!On the interior left and right side are two pockets, which are great for storing notes, a tablet, or extra notepad. Both pockets measure 9.5" wide, by 9" deep.Padded for protection of contents!Rear zippered pocket (13 x 9") holds contents securely.Comfortable thick leather handle.Made with military spec. 500d Cordura Nylon, at our location in St. Petersburg, FL! Size when open: 26.5" x 13.75"When closed: 13.75 x 12"Weight: 660g/1.5lbs