A plastic binding comb is a round binding spine that has 19 plastic prongs which are opened and inserted into the corresponding holes your document. Plastic binding combs are available in a broad range of sizes, accommodating as few as 12 pages and as many as 425 pages. They come in standard 11″ lengths, which are made up of 19 rings and are sized to bind 8 1/2″ x 11″ (letter size) paper. Comb sizing is based upon the diameter of the comb in inches (or fractions thereof). Binding combs come in a wide variety of colors, allowing organizations to create custom-looking bound documents without having to pay for custom combs. The comb design allows for easy editing of documents, since it can be opened after binding to add, remove or reorder pages without damage. It is the only binding style that offers that capability, making it ideal for organizations that require frequent updates to their materials, such as churches or schools.