Folders come in many shapes and sizes. Typically to hold A4 pages folders can have gutters for capacity and a pocket to secure the documents inside. To secure the folder, they can have either self locking tabs (useful for space saving storage), or can be supplied glued together. Folders can be printed either on the outside only, or on all pages and flaps. For extra protection and impact, folders can also be laminated in gloss or matt or varnished to seal them.